日本地球惑星科学連合2018年大会

講演情報

[EE] ポスター発表

セッション記号 A (大気水圏科学) » A-HW 水文・陸水・地下水学・水環境

[A-HW20] 流域の物質輸送と栄養塩循環-人間活動および気候変動の影響-

2018年5月21日(月) 15:30 〜 17:00 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:齋藤 光代(岡山大学大学院環境生命科学研究科)、小野寺 真一(広島大学大学院総合科学研究科)、細野 高啓(熊本大学大学院先導機構、共同)、Adina Paytan(University of California Santa Cruz)

[AHW20-P10] Estimation of water budget including deep groundwater discharge in small islands, using hourly resolution SWAT Model analysis

*Yang Cao1Shin-ichi Onodera1Fandy Tri Admajaya1Yuta Shimizu2Mitsuyo Saito3 (1.Graduate School of Integrate Arts and Sciences, Hiroshima University、2.Western Region Agricultural Research Center, National Agriculture and Food Research Organization、3.Graduate School of Environmental and Life Science, Okayama University)

キーワード:SWAT, island, hourly simulation, water budget, runoff

This study used hourly simulations in the SWAT model to research the water budget in small catchments on the Ikuchijima island. Satisfactory results were obtained for flow simulations in the small catchments using hourly precipitation data. The results show that R2 and NS both above 0.5 during the calibration and the validation period. And |PBIAS| is below 10 in the both cases. Based on this result, we found that SWAT hourly simulations performed well in rainstorms in small catchment areas and it successfully simulated the flood in this catchment during the simulation period. Therefore, it is considered that SWAT model hourly simulation is reliable in rainstorm and flood forecasting. This study also analyzed water balance components such as surface runoff, lateral flow, base flow and evaporation in this small catchment area, and the results were consistent with the actual conditions of the catchment such as climate, vegetation and geology.