Search Results 1-20 of 1372

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Global high-resolution estimation of cropland suitability and its comparative analysis to actual cropland distribution

Ishikawa Yuki , Yamazaki Dai

… Global 500-m (18-arcsec) resolution cropland suitability was estimated using recently developed high-resolution global cropland data and a digital elevation model. …

Hydrological Research Letters 15(2), 9-15, 2021

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2

Estimation of freshwater discharge from western Kamchatka Peninsula to the Sea of Okhotsk using SWAT model [in Japanese]

Shi Muqing , Shiraiwa Takayuki , Mitsudera Humio , Muravyev Yaroslav

… Based on hydrological observation data we obtained, we analyze and estimate freshwater discharge from the KP using the SWAT model. …

Proceedings of the General Meeting of the Association of Japanese Geographers 2021s(0), 79, 2021

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3

Evaluation of climate change impacts by combining hydrological model and crop model to contribute "Climate Action"

Homma Koki

Abstracts of Meeting of the CSSJ 251(0), 164-164, 2021

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Potential of representing the diurnal cycle of local-scale precipitation in northeastern Thailand using 5-km and 2-km grid regional climate models

Takayabu Izuru , N. Ishizaki Noriko , Nakaegawa Tosiyuki , Sasaki Hidetaka , Wongseree Waranyu

… The model simulation indicated that the convergence area over the mountain on the south of the Khorat Plateau occurred in the afternoon in association with the occurrence of precipitation. … A bias in terms of the amount of precipitation in the 5-km grid model was partially removed through the convection-permitting 2-km grid model. …

Hydrological Research Letters 15(1), 1-8, 2021

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5

LSTM Based Hybrid Method for Basin Water Level Prediction by Using Precipitation Data

Shuofeng Liu , Puwen Lei , Koyamada Koji

… However, physical models tend to become difficult to apply when it comes to some small rivers which have insufficient hydrological data. … In our paper, we focus on the precipitation-only water level forecasting problem by using long-short-term memory (LSTM) based hybrid model, and try predicting the future water level of all the rivers in Japan by using simulated precipitation data from the database for Policy Decision making for Future climate change (d4PDF). …

Journal of Advanced Simulation in Science and Engineering 8(1), 40-52, 2021

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6

Is Surabaya being planned as a low-risk city?:A case study on the effect of urban spatial plans in the Kedurus catchment area on flash flood risk reduction in Surabaya 

Pamungkas Adjie , Purwitaningsih Santika

… SWAT analysis is a hydrological analysis to measure surface runoff from precipitation with consideration of land uses, soil types, climatic data, topography and related infrastructure systems. …

International Review for Spatial Planning and Sustainable Development 9(1), 78-92, 2021

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7

Prediction of Urban Non-point Pollution Load by Statistical Analysis of Data of Published Research and Its Reliability Evaluation –Statistical Analysis of Mean Load and Verification and Modification of Previously Proposed Model Using Newly Obtained Data– [in Japanese]

OZAKI Noriatsu , WADA Keiko , MURAKAMI Michio , NAKAJIMA Fumiyuki , FURUMAI Hiroaki

市街地流出に関する先行研究モデルの検証と改良を目的に, 新たに入手した雨天時流出データを適用し実測値と比較した。モデルは地点, 降雨, 水文特性を表すパラメータによりCOD, SS, TN, TPの各降雨イベントの流量加重平均濃度 (EMC) を予測する回帰モデルであり, 適用の結果, 数倍の範囲で実測値を予測していることを示した。一方EMCの予測を, モデルを用いず既往の各降雨 …

Journal of Japan Society on Water Environment 44(1), 1-8, 2021

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8

Study on Rainfall-runoff analysis considering the uncertainty of model parameters based on stochastic differential equation [in Japanese]

成岱蔚 , 山田正 , 山田朋人

… However, modeling also means incomplete information, when it comes to rainfall-runoff analysis, incomplete information means insufficient observation data, simplifying the physical process, and the uncertainty of model parameters. … Besides, the present study also suggested a way to deal with complex hydrological models with many parameters. …

中央大学理工学研究所論文集 (25), 1-11, 2020-03-31

IR DOI
9

Comparison of gridded precipitation datasets for rainfall-runoff and inundation modeling in the Mekong River Basin

Try Sophal , Tanaka Shigenobu , Tanaka Kenji , Sayama Takahiro , Oeurng Chantha , Uk Sovannara , Takara Kaoru , Hu Maochuan , Han Dawei

… Precipitation, as a primary hydrological variable in the water cycle plays an important role in hydrological modeling. … The reliability of hydrological modeling is highly related to the quality of precipitation data. … Firstly, the performance of the Rainfall-Runoff-Inundation (RRI) model in this basin was evaluated using the gauged rainfall. …

PLOS ONE 15(1), 2020-01-08

IR
10

GLOBAL 5-ARCMIN RESOLUTION WATER RESOURCE ASSESSMENT USING THE H08 GLOBAL HYDROLOGICAL MODEL [in Japanese]

土居慶祐 , REVEL Menaka , 花崎直太 , 鼎信次郎

水工学論文集 Annual journal of Hydraulic Engineering, JSCE 65, Ⅰ_109-114, 2020
11

ANALYSIS OF DEM RESOLUTION DEPENDENCE ON A HYDROLOGICAL AND SEDIMENT MODEL FOR AN UNGAUGED BASIN IN PERU

CHERO Luis , TACHIKAWA Yasuto , YOROZU Kazuaki , ICHIKAWA Yutaka

水工学論文集 Annual journal of Hydraulic Engineering, JSCE 65, Ⅰ_1099-1104, 2020
12

IMPACT OF SYSTEM NOISE SPECIFICATION ON ENSEMBLE KALMAN FILTER PERFORMANCE IN A DISTRIBUTED HYDROLOGICAL MODEL

KHANIYA Manoj , TACHIKAWA Yasuto , ICHIKAWA Yutaka , YOROZU Kazuaki

水工学論文集 Annual journal of Hydraulic Engineering, JSCE 65, Ⅰ_361-366, 2020
13

Assessing Vegetation Restoration Impact Hydrological Cycle in The Loess Plateau of North Central China

MENG Linghao , KOMORI Daisuke

地球環境研究論文集 : 地球環境シンポジウム 28, 409-414, 2020
14

LONGITUDINAL EVALUATION OF ALTERED FLOW REGIMES IN THE OMARU RIVER NETWORK USING A DISTRIBUTED HYDROLOGICAL MODEL [in Japanese]

峯田陽生 , 糠澤桂 , 中尾彰吾 , 鈴木祥広

地球環境研究論文集 : 地球環境シンポジウム 28, 65-74, 2020
15

LONGITUDINAL EVALUATION OF ALTERED FLOW REGIMES IN THE OMARU RIVER NETWORK USING A DISTRIBUTED HYDROLOGICAL MODEL [in Japanese]

MINEDA Haruki , NUKAZAWA Kei , NAKAO Shogo , SUZUKI Yoshihiro

　水力発電用の取水や洪水調節による流況改変の影響を水系一貫で評価した研究事例は少ないのが現状である．そこで本研究では，宮崎県小丸川流域を対象に分布型流出モデルを適用し，ダム・堰による流況改変程度と，発電放流・支流による流況の緩和の縦断的パターンを評価した．ダム・堰の放流をモデル内に含める・含めないケースでそれぞれ流出計算し，両者の流況指標値の比により流況改変程度を定量化した．流出 …

Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 76(5), I_65-I_74, 2020

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16

Assessing Vegetation Restoration Impact Hydrological Cycle in The Loess Plateau of North Central China

MENG Linghao , KOMORI Daisuke

… This research is to assess the impact of human activities, especially land use and vegetation changes on the natural hydrological factors in the Loess Plateau, a region suffered the most severe soil erosion over the world. … Three stations at Loss Plateau are used to analyze water cycle parameter changes simulated by the land surface model H08 under the same climate and different land use scenarios. …

Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 76(5), I_409-I_414, 2020

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17

CLIMATE CHANGE EFFECTS ON SNOWMELT RUNOFF IN SHOGAWA RIVER BASIN [in Japanese]

ARAI Ryosuke , TOYODA Yasushi , OHBA Masamichi , SATO Takahiro , KAZAMA So

　我が国の日本海側の地域では，Rain-on-Snow (RoS)に伴う融雪出水が冬季に極端化すると予測されている．本研究の目的は，RoS起因の融雪出水に対する気候変動の影響を流域スケールで評価することである．本研究は庄川流域を対象として，積雪・融雪過程を考慮した水文モデルに気候予測データベース(d4PDF)の気象データを標高に応じて適切に入力した．温暖化に伴い，平均的な融雪出水 …

Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 76(5), I_109-I_119, 2020

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18

Understanding Hydrological Sensitivities Induced by Various Forcing Agents with a Climate Model

Suzuki Kentaroh , Takemura Toshihiko

… The apparent hydrological sensitivity, defined as the global-mean precipitation change per increase of the global-mean temperature, is investigated for scenarios induced by different forcing agents. …

SOLA 16(0), 240-245, 2020

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19

Assessing climate change impacts on extreme rainfall and severe flooding during the summer monsoon season in the Ishikari River basin, Japan

Thanh Nguyen Thu , Nakatsugawa Makoto , J. Yamada Tomohito , Hoshino Tsuyoshi

… We used the d4PDF 5-km downscaled rainfall data as input for the IFAS model. …

Hydrological Research Letters 14(4), 155-161, 2020

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20

Assessing Flood Risk of the Chao Phraya River Basin Based on Statistical Rainfall Analysis

Shakti P. C. , Miyamoto Mamoru , Misumi Ryohei , Nakamura Yousuke , Sriariyawat Anurak , Visessri Supattra , Kakinuma Daiki

… each method had its pros and cons for hydrological applications. … Finally, utilizing a Rainfall-Runoff-Inundation (RRI) model, we estimated the possible flood inundation extent and depth, which was outlined over the Chao Phraya River Basin using the design hyetographs with different return periods. …

Journal of Disaster Research 15(7), 1025-1039, 2020

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