Publisher：Informa UK Limited  

DOI： 10.1080/00380768.2022.2108685

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Language：Japanese   Publisher：Society of Environmental Conservation Engineering  

DOI： 10.5956/jriet.51.4_195

DOI： 10.3178/jjshwr.37.1819_references_DOI_2PbwNwPcHYPpMcjdAL67wmalkJD

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I032287168

Language：Japanese   Publisher：Japanese Institute of Landscape Architecture  

DOI： 10.5632/jila.86.16

DOI： 10.3178/jjshwr.37.1819_references_DOI_A7uc5KfsHoHK9LrQjbcSnZBQIDK

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I032201332

Language：Japanese   Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering  

DOI： 10.11408/jjsidre.90.9_695

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering  

DOI： 10.11408/jjsidre.89.12_933

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Other Link： http://id.ndl.go.jp/bib/031870723

Language：Japanese   Publisher：京都 : 全国日本学士会  

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I031817096

Language：Japanese   Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering  

DOI： 10.11408/jjsidre.89.11_827

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Other Link： http://id.ndl.go.jp/bib/031828520

Language：Japanese   Publisher：Japan Society of Civil Engineers  

Paddy Field DAM is designed not to spillover if levee hight is maintained at standard level and runoff via drainage orifice is free flow. However, the results of our numerical simulations at the watershed scale presented a number of paddy fields were spilled over. This was due to several external factors, such as rainwater inflow from adjacent land parcels and backflow into the paddy fields caused by rising water levels in the drainage channels, but it was difficult to identify the factors for each of the many paddy fields in the watershed. In this study, we developed a new analytical method to visualize the inflow from the adjacent land and the backflow from the drainage canal by using the runoff component visualization model to identify the causes of overflowing rice paddies. In addition, it was demonstrated that raising the height of the levees of rice paddies was effective in reducing the occurrence of spillover.

DOI： 10.2208/jscejhe.77.2_i_439

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Publisher：Elsevier BV  

DOI： 10.1016/j.jenvrad.2020.106441

DOI： 10.1080/00380768.2022.2031284_references_DOI_TQdGgy975VJCtB2vRI5FpEiJWhP

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Publisher：Public Library of Science (PLoS)  

DOI： 10.1371/journal.pone.0232139

DOI： 10.1080/00380768.2021.2010503_references_DOI_UuisHL1leh9Y24eydT4S1D5N0z9

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Other Link： https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19H03072/

Language：Japanese   Publisher：東京 : 土木学会  

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I030808629

Language：Japanese   Publisher：東京 : 土木学会  

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I030808549

Language：Japanese   Publisher：東京 : 土木学会  

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I030808582

Language：Japanese   Publisher：Japan Radioisotope Association  

We monitored soil and rice radiocaesium concentrations in paddy fields in Minamisoma City, Fukushima Prefecture, Japan, from 2013 to 2016. As a result, brown rice samples collected in 2013 contained average 67 Bq/kg-dry weight (dw) of ¹³⁷Cs. Five in the 9 samples exceeded 100 Bq/kg radiocaesium, which is the limit for food radioactive contamination in Japan. This is presumably due to radiocaesium fallout led by debris removal operations in the Fukushima Dai-ichi Nuclear Power Plant on 19 August 2013. ¹³⁷Cs concentrations in the brown rice samples collected in 2014–2016 contained only 2–8 Bq/kg-dw. The soil and rice samples collected near water inlets of the paddy fields showed higher ¹³⁷Cs concentrations than those collected at center and near water outlets. Transfer factors of ¹³⁷Cs from soil to brown rice also tended to be higher at the water inlets except 2013, suggesting that irrigation water can affect on radiocaesium concentration in rice plants.

DOI： 10.3769/radioisotopes.68.1

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I029460542

Language：Japanese   Publisher：東京 : 土木学会  

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I030113184

Language：Japanese   Publisher：The Association of Japanese Geographers  

DOI： 10.14866/ajg.2019a.0_34

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Authorship：Lead author   Language：Japanese  

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering  

DOI： 10.11408/jjsidre.86.2_121

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Other Link： http://id.ndl.go.jp/bib/028830797

Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

To investigate the proper design of runoff control device adopted in Mitsuke city, Japan, where paddy field dam has been promoted, this study firstly, classified the existing runoff control devices into “function-integrated” and “function-independent” type to compare their advantages and disadvantages; secondly, introduced the basic design concept of a new runoff control device suitable for the conventional cylindrical drainage outlet; and finally, evaluated flood mitigation effect of the newly developed device. The following superiorities of the function-independent device in which the function of runoff control and water management are mutually independent became clear; (1) a sustainable runoff control performance under heavy rainfall events, (2) minimal disruption to the farmers' daily water management practices under small rainfall events, and (3) stable runoff control function due to little influence of paddy field water level changes. In response to these superiorities, authors fundamentally reexamined the structure of the runoff control device already adopted in Mitsuke city, and developed a new function-independent device suitable for the cylindrical drainage outlet. As a result of the evaluation by computer calculation, it became clear that the new device presented a better performance in functionality and sustainability than the conventional one.

DOI： 10.11408/jsidre.85.i_159

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Other Link： http://id.ndl.go.jp/bib/028799241

Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

DOI： 10.11408/jsidre.85.iv_5

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society for Analytical Chemistry  

A large amount of radiocesium was released from the accident at Fukushima Daiichi Nuclear Power Plant of Tokyo Electric Power Company. The determination of dissolved and particulate radiocesium concentrations in water is important, which can be used as basic information for understanding the long-term radiocesium dynamics in the environment and the transfer of radiocesium to crops. Conventional quantitative methods include the evaporative concentration to the dryness method and the AMP method. These methods need to concentrate about 20–200 L of water due to the low concentration of the dissolved radiocesium. After the accident, several new methods, such as the Prussian blue filter cartridge method and the solid-phase disk method, have been developed and put to practical use. In this study, we carried out an accuracy evaluation test to assess five methods (<i>i.e.</i>, the evaporative concentration to dryness method, the AMP method, the Prussian blue filter cartridge method, the solid-phase disk method, and the ion-change resin method) using 3 types of water samples containing 0.01-1.0 Bq L⁻¹ of dissolved radiocesium. Our results showed that the <i>z</i>-scores of over 80 % of the measured data were within ±2 and their CVs in the range of 8-13 %, indicating good reproducibility of these methods.

DOI： 10.2116/bunsekikagaku.66.299

DOI： 10.1007/s10967-019-06696-2_references_DOI_OwVF6cNNaFPryhCr6M6bONV6uz2

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Authorship：Lead author   Language：Japanese  

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Publisher：Elsevier BV  

DOI： 10.1016/j.jenvrad.2016.01.013

DOI： 10.1007/s10333-019-00694-6_references_DOI_Z4wml9KhPXyNl6CuFa33BgmwdqC

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Other Link： https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-26511007/

Language：Japanese   Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering  

DOI： 10.11408/jjsidre.84.4_275

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Other Link： http://id.ndl.go.jp/bib/027265264

Language：Japanese   Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering  

DOI： 10.11408/jjsidre.84.4_271

DOI： 10.2208/jscejer.77.5_i_77_references_DOI_aFMUlLYNnin9tivsVv5Ri1YDC2L

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Other Link： http://id.ndl.go.jp/bib/027265241

Language：Japanese   Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering  

DOI： 10.11408/jjsidre.84.8_685

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Other Link： http://id.ndl.go.jp/bib/027588732

Authorship：Lead author   Language：Japanese  

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Language：Japanese   Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering  

DOI： 10.11408/jjsidre.83.11_909

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Other Link： http://id.ndl.go.jp/bib/026853658

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

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Other Link： http://hdl.handle.net/10191/34151

Publisher：Elsevier BV  

DOI： 10.1016/j.scitotenv.2014.01.129

DOI： 10.1002/2016jg003428_references_DOI_8sPzl5VN78u4HMhBdWC72egipnJ

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Language：Japanese   Publisher：The Japan Landslide Society  

DOI： 10.3313/jls.51.195

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I025847402

Publisher：Springer Japan  

DOI： 10.1007/978-4-431-55330-4_13

DOI： 10.2208/jscejhe.76.1_295_references_DOI_JftS45GT8Hbxww3Qj23Mzy1Zj8b

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Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

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Other Link： http://hdl.handle.net/10191/29546

Language：Japanese   Publisher：東京 : 土木学会  

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I024919403

Language：Japanese   Publisher：Japan Society of Civil Engineers  

The Paddy Field Dam (PFD) is a flood mitigation measure using paddy fields with runoff control devices installed in drainage boxes of paddy field plots. Although the flood mitigation function by the PFD has been proven to be effective, the propagation of this measure is not an easy task due to lack of incentives to the upstream farmers. Authors have been proposing to find a governmental financial support system to create a farmers incentive to voluntarily introduce the measure. For the system to be established, the economic value of social function of the PDF needs to be estimated. This study attempts to make an economic evaluation that the Paddy Field Dam would bring about in the case of a polder area in Shirone district, Niigata city, where Paddy Field Dam project has been practiced since 2009. As a result of the evaluation using direct cost method, the value of the Paddy Field Dam project was calculated to be approximately 11,200yen/10 a/year.

DOI： 10.2208/jscejhe.69.i_1531

DOI： 10.2208/jscejhe.76.2_i_793_references_DOI_ZdrJ5AwGIqQ5onYz1P7U0x8NTLs

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Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

A newly developed flood inundation simulation model targeting to low-lying agricultural watersheds adopted Topographically Adjusted Cells (TAC) to calculate floodwater movement. The TAC is characterized by irregular shaped polygonal cells which are bounded by linear structures such as roads or elevation gaps. These features result in higher calculation efficiency and reproducibility through the avoidance of unnecessary numerical grid allocation and having the linear boundaries possess elevation values. Despite these advantages, the simulation model with TAC has not been widely used due to the cost in terms of labor and time involved in the acquisition and arrangement of the geometric attribute of the cells. To overcome these technical hurdles, we developed a method to create TAC using GIS functions and to prepare complex geometric attribute data with calculation algorisms. This paper introduces the labor and time-saving method to arrange TAC based on the example of watershed model that the we developed.

DOI： 10.11408/jsidre.81.185

DOI： 10.2208/jscejhe.76.2_i_439_references_DOI_GahvZ9c1IvP3qwpvOAOzdyxXeAG

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I024715251

Language：Japanese   Publisher：東京 : 雨水貯留浸透技術協会  

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I024786273

Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

The actual conditions of the implementation of the disaster restoration projects in Koi breeding ponds were surveyed, and the location characteristics of the unrestored breeding ponds were analyzed in the M settlement in the Yamakoshi area of the Nagaoka City struck by the Mid-Niigata Prefecture Earthquake in 2004. The findings are as follows: Although the Small-scale Disaster Restoration Project (In Japanese “Tezukuri-tanaoshi-tou-shien” Project) created by the government of Niigata Pref. made a contribution in all of the Koi breeder's classes which were classified by the management scale, a large number of breeding ponds used by the small scale breeders were left unrestored. Moreover, the plots tended to be left unrestored which were smaller, more apart from the road, inclined more sharply, or at higher altitudes. It could be necessary to arrange the facility function and the location of breeding ponds on a normal basis in order to reduce the development of the unrestored ponds.

DOI： 10.11408/jsidre.80.59

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I023545977

Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

Radiocesium (Cs) decontamination of land has been required as one of the restoration measures after the Tohoku-Pacific Ocean Earthquake disaster. The Ministry of Agriculture, Forestry and Fisheries (MAFF) of Japan plans to carry out decontamination measures of farmland in response to the situation of land contamination. However, in order to achieve effective restoration, strategic and comprehensive measures including land readjustment are necessary. In this paper, we examined characteristics of Cs contamination from the view of the spatial extent contamination, land use, land improvement and working environment, and made the following proposals: (1) Implementation of Cs decontamination works ought to follow the principle of “containment”, “isolation”, and “securing long-term safety” of Cs, and improve both production environment and working environment of farmlands. (2) Strategic approaches should be carried out in a comprehensive and unified manner for the effective implementation of Cs decontamination.

DOI： 10.11408/jsidre.80.555

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I024201117

Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

Low-lying agricultural reservoirs under the pressure of urbanization in Japan are subject to increasingly higher risk of inundation disaster due to the change in the runoff characteristics by decreasing the area of paddy fields and the recent increase in the frequency and magnitude of heavy rainfall events. The objective of this study is to develop an inundation analysis model for the evaluation of the flood mitigation effect of a Paddy Field Dam project, specifically aiming at low-lying agricultural lands. The model developed in this study is composed of three modules: runoff calculation module in which the runoff from each landuse cell is calculated using water balance analysis, one dimensional unsteady flow module in which flood routing is performed to calculate flow in the channel network, and inundation flow module in which the behavior of flooded water is demonstrated using topographically adjustable cells. One of the unique characteristics of this model is that the runoff from landuse with different attributes are reflected in a realistic but concise manner in the calculation as the origin of runoff. As a result of applying the model to two type of study field, inundation process was verified to be reproduced well.

DOI： 10.11408/jsidre.80.479

DOI： 10.2208/jscejhe.76.2_i_439_references_DOI_JrMMoBiQbu1bUJKco89qjkjuGOK

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I024200951

Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

The objective of this study is to develop a system that can automatically count the number of loaches ascending corrugated-pipe paddy field fishways by adopting the counting principle of resistivity fish counter originally designed for salmon. As the results of laboratory and in situ experiments, the counting mechanism of the resistivity fish counter could be applied to counting loaches by modifying the sensor allocation and adjusting voltage level. Counting precision was evaluated to be 86% with video monitoring analyses. In addition, long-term automatic operation in situ without permanent power sources was successful using rechargeable batteries (capacity 115Ah) and high-resolution and large-capacity data logger (memory capacity 2GB). The system could operate as long as 79 hours with two batteries connected in parallel.

DOI： 10.11408/jsidre.80.277

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I023870217

Language：Japanese   Publisher：THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES  

The Paddy Field Dam is a flood control measure undertaken for the purpose of alleviating flood damages using paddy fields with runoff control devices installed in drainage boxes of paddy field plots. This study attempts to estimate the social function in economic value of the Paddy Field Dam measure being practiced in Kamihayashi district, Murakami city, Niigata prefecture, and examines its technical characteristics and the future possibilities. As a result of the estimation using the replacement cost method, the value of the Paddy Field Dam project was calculated to be approximately 39,000yen/10 a/year. This value by far exceeds the income earned by farmers through the production of rice per 10 a. The characteristics of the economic effect generated by the Paddy Field Dam can be summarized as follows: 1) Controllability of the flood control effect, 2) High dependency of the effect on the surrounding environment, 3) Autonomous emergence of the effect, 4) Restriction of risk avoidance behavior of farmers, and 5) No productivity change in the rice production. It has been suggested that the strategic planning approach taking into account these characteristics is crucial for the dissemination of the Paddy Field Dam.

DOI： 10.3178/jjshwr.24.271

DOI： 10.2208/jscejhe.76.2_i_349_references_DOI_9nYD2FgKNiVQPWHBVPK1PiKe0ht

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I11228587

Language：Japanese   Publisher：Japan Society of Civil Engineers  

Low-lying agricultural reservoirs under the pressure of urbanization in Japan are subject to increasingly higher risk of inundation disaster due to the change in the runoff characteristics by decreasing the area of paddy fields and the recent increase in the frequency and magnitude of heavy rainfall events. The objective of this study is to develop an inundation analysis model specifically aiming at low-ying agricultural reservoirs. The model developed in this study is composed of three modules: runoff calculation module in which the runoff from each landuse cell is calculated using water balance analysis, channel network module in which the flow in the channel network is calculated by a one dimensional unsteady flow analysis, and inundation flow module in which the behavior of overflown water is demonstrated using topographically adjustable cells. One of the unique characteristics of this model is the runoff from landuse with different attributes are reflected in the course of calculation in a realistic but concise manner as the origin of runoff. As a result of applying the model to a study field, inundation process was verified to be reproduced well.

DOI： 10.2208/jscejhe.67.i_991

DOI： 10.2208/journalofjsce.23-00207_references_DOI_IT51J2COna3KFOhywx4cd82KJzS

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Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

This paper aims to examine the historical change in the newly developed water resources of Koi breeding ponds in the Higashiyama area of the Ojiya City and the Old Yamakoshi Village. It was clarified that the development of new water resources and the introduction of large pond construction techniques accounted for the rapid increase in the number of Koi breeding ponds after the 1960s. The development of water resources is divided into the following eight stages. 1) before 1945; Koi were bred together with food carps in traditional style, 2) after 1945; breeding ponds were converted from paddy fields under worse production condition, 3) after the mid-1960s; large-scale irrigation ponds in plains were used for breeding Koi, 4) after the 1970s; breeding ponds were converted from paddy fields as a result of the rice production adjustment policy, 5) after the mid-1970s; breeding ponds fed by snowmelt and rainwater were being constructed, 6) after the 1980s; existing breeding ponds were borrowed or bought, 7) after the 1990s; large-scale irrigation ponds in plains were used again for breeding Koi, 8) after 2005; groundwater was pumped up from wells for breeding ponds.

DOI： 10.11408/jsidre.79.423

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Language：Japanese   Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering  

DOI： 10.11408/jjsidre.79.9_695

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I11228496

Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

While the “Paddy Field Dam” project has been recognized as an effective flood control measure, there are some cases in which the runoff control boards are vertically installed on the opening of the drainage boxes without careful consideration of the orifice shape and size. The important criteria for the runoff control boards to be satisfied are: 1. to maintain a sufficient peak runoff control function, 2. to avoid excessive ponding causing overflow, 3. to minimize the influence to the ordinary water management, and 4. to reserve sufficient orifice area to avoid blockage of the orifice with floating litters. The purpose of this study is to examine proper shapes and sizes of the orifice to satisfy the criteria for the vertically installed runoff control boards through experiments and simulations. Given the condition that the orifice has sufficient area to avoid overflow with 10 and 20 year return period rainfall event (criteria 2), the simulation results show that the orifice with horizontally wider shapes has advantages over the square or circular shapes in terms of the criteria 1 and 3. The disadvantage of the horizontally wider shapes is the blockage of the orifice with floating litters (criteria 4). In conclusion, we proposed to secure sufficient vertical distance to avoid this problem by setting a lower limit on the vertical distance and then determine the widest horizontal distance to optimize all the criteria. In addition, we have constructed the “Orifice Design Assist Tool” on the basis of the examinations in this study.

DOI： 10.11408/jsidre.78.273

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I10818610

Language：Japanese   Publisher：Japan Society of Civil Engineers  

Irrigation water demand has tended to be concentrated during certain hours of the day, particularly in the morning and the evening, in response to an increase in the number of part-time farmers. On the other hand, the volume of supplied water is customarily fixed all day regardless of the fluctuation in demand. This results in a temporal and spatial imbalance of supply and demand, that is, a short supply occurs in the downstream area during the peak demand hours, despite the excessively supplied water is wasted during the low demand hours. In this study, authors proposed an “elastic water supply model” to realize more efficient irrigation water distribution and saving the usable water resource. The model was applied to the study field, K river basin, S city, Niigata prefecture, where water resource is chronically tight for the size of the beneficiary area of the irrigation water. The model evaluation was conducted by numerical simulation performed on the basis of the field survey concerning the time-series water demand fluctuation and arrival time of irrigation water. The result shows that the elastic water supply model functions to satisfy the peak demand requirement as well as to save water resources by 33% under the condition of installing regulating ponds with an appropriate capacity in the midstream of trunk irrigation channels for the sake of compensating the delay in the arrival of irrigation water.

DOI： 10.11532/river.16.0_277

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Language：Japanese   Publisher：Japan Society of Civil Engineers  

The Paddy Field Dam, a flood mitigation measure taking advantage of the ponding function of paddy fields, has been introduced as a complementary function to the existing drainage facilities to countermeasure a recent increase in the frequency and magnitude of heavy rainfall events. The core facility of the Paddy Field Dam is the runoff control device, which shrinks the drain orifice and restricts the volume of surface water runoff from a paddy field plot. Although this technology was originally developed for modernized paddy fields equipped with concrete-made drainage boxes, authors contrived the runoff control device to be applicable to unimproved paddy fields without drainage boxes being equipped. The purpose of this study is to quantitively evaluate the flood mitigation performance of the paddy fields installed with the newly developed device in an unimproved paddy field area. The evaluation was conducted by an integrated simulation model. The result of the simulation shows that the Paddy Field Dam in the study area would have the effect reducing the inundation damage due to 30-year return period rainfall event to almost that due to 10-year return period rainfall event.

DOI： 10.11532/river.16.0_507

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Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering  

DOI： 10.11408/jjsidre.78.7_559

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I10768046

Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

This study examines whether the adequate population of loaches, one of the main food resources of Japanese Crested Ibis (Toki), can be maintained by the implementation of limited-scale improvement works of the habitat. As a result of the monitoring survey with the mark-recapture method, it was confirmed that the number of loaches was estimated to be 1.5 per m² in the study paddy field, and 5.2 per m² in the study canal, which in turn, exceeded the necessary amount for feeding Japanese Crested Ibis reported by Japan Wildlife Research Center. The major factors leading to this favorable outcome are considered to be the existence of the intercepting drain in the paddy field, the canal fishway, the paddy field fishway, and environment-conscious canal. It is also supposed that the loaches' range of activity is quite limited in comparison with the spatial extent of improvement works. These outcomes leads to a conclusion that the limited-scale improvement works are effective for the maintenance of loach population.

DOI： 10.11408/jsidre.77.335

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I10423240

Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

Since 2002, Kamihayashi district in Niigata prefecture has been undertaking flood mitigation measures using paddy fields by installing runoff control devices in drainage pits. The purpose of this study is to quantitatively evaluate the effect of this runoff control device on runoff detention at the paddy field scale. The factors controlling the rate of surface water drainage from a paddy field during ponding season are the width of the drainage outlet (rectangular weir) and the diameter of the drainage hole on the floor of the drainage pit (orifice). On the other hand, during midsummer drainage season, the surface of the paddy field is furrowed for promoting quick drainage. Calculation of runoff rate with and without runoff control devices is conducted using the formulae of rectangular weir and orifice in the case of ponding season, and an orifice formula incorporated in tank model for midsummer drainage season. The result shows that the peak discharge from a paddy field plot decreases by 48% for ponding paddy field and 55% for midsummer drainage paddy field with an observed rainfall event (daily precipitation of 101.8mm), and 73% and 71% respectively with a 50-year return period rainfall.

DOI： 10.11408/jsidre.77.263

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I10366402

Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

Since 2002, Kamihayashi district in Niigata prefecture has been undertaking flood mitigation measures using paddy fields by installing runoff control devices in drainage pits. The purpose of this study is to evaluate the flood mitigation performance of a paddy field with runoff control devices by using combined hydrologic analyses and flood routing. The model constructed for runoff analysis is composed of the following three modules; mountain-urban module where the overland flow was estimated by the Kinematic Wave method, paddy field module where runoff from paddy fields was calculated by water balance analysis, and river/canal module where flood routing was performed by the one-dimensional unsteady flow model. The output of the first two modules represents the input of the third module. The result of the simulation shows that the main river and canal discharge would be decreased by 25% to 29% and water level would be lowered by 0.17 to 0.23m in the case of all the paddy fields being installed with runoff control devices. From these outcomes, it is confirmed that the runoff control measure in the study area is functioning effectively.

DOI： 10.11408/jsidre.77.273

DOI： 10.2208/jscejhe.78.2_i_235_references_DOI_8gCW7fCk7RLI7bSyBJrkFqvWrk1

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I10366451

Language：Japanese   Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering  

DOI： 10.11408/jjsidre.77.12_1009

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I10521505

Language：Japanese   Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering  

DOI： 10.11408/jjsidre2007.76.129

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Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

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Other Link： http://id.ndl.go.jp/bib/8841303

Language：Japanese   Publisher：東京 : 農業土木学会  

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I8751211

Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

DOI： 10.11408/jjsidre1965.75.205

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Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

DOI： 10.11408/jjsidre1965.75.197

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Language：Japanese   Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering  

DOI： 10.11408/jjsidre1965.75.279

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Publisher：Elsevier BV  

DOI： 10.1016/j.agwat.2006.02.013

DOI： 10.4287/jsprs.48.348_references_DOI_PboqUNxj2dLKXSNpv4dkHOAdeb2

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Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.65.0_264_1

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Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.65.0_264_2

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Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.65.0_263_3

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Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.65.0_136_1

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Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.65.0_136_2

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Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.65.0_135_2

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Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.64.0_149_1

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Language：Japanese   Publisher：鳥取 : 日本砂丘学会  

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I028812477

Language：Japanese   Publisher：東京 : 農業土木事業協会  

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I028668447

Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.63.0_162_1

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Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.63.0_161_3

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Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.62.0_147_1

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Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.61.0_167_1

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Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.61.0_264_3

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Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.61.0_166_3

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Language：Japanese   Publisher：The Japanese Society of Irrigation Drainage and Rural Engineering  

DOI： 10.11408/jjsidre.82.6_479

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Other Link： http://id.ndl.go.jp/bib/025531480

Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.60.0_146_1

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Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.59.0_174_2

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Language：Japanese   Publisher：新潟 : 新潟大学自然科学系附置コア・ステーション「環境・防災GISセンター」  

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I10736099

Language：Japanese  

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Other Link： http://id.ndl.go.jp/bib/8840932

Language：Japanese  

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Other Link： http://id.ndl.go.jp/bib/8841678

Language：Japanese  

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Other Link： http://id.ndl.go.jp/bib/8840964