Improving AVSWAT stream flow simulation by incorporating groundwater recharge prediction in the upstream lesti watershed, East Java, Indonesia

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Title:	Improving AVSWAT stream flow simulation by incorporating groundwater recharge prediction in the upstream lesti watershed, East Java, Indonesia
Authors:	吳瑞賢;Rahayuningtyas, Christina;Wu, Ray-Shyan;Anwar, Ruslin;Chiang, Li-Chi
Contributors:	工學院土木工程學系
Keywords:	Annual variations;Aquifers;Climatic conditions;Computer simulation;Consistency tests;Dry season;Flow simulation;Groundwater;Groundwater Recharge;Hydrologic models;Observation wells;Outlets;Precipitation;Rainy season;Rivers;Seasons;Simulation;Soil;Soil investigations;Soil water;Specific yield;Stream discharge;Stream flow;Stream flow Simulation;SWAT;Temporal variability;Temporal variations;Tropical climate;Tropical environment;Tropical environments;Upstream;Water levels;Water resources;Watersheds;Wet season
Date:	2014-01-01
Issue Date:	2026-04-21 13:41:41 (UTC+8)
Publisher:	Chinese Geoscience Union;Taiwan: 中華民國地球科學學會
Abstract:	摘要： The upstream Lesti watershed is one of the major watersheds of East Java in Indonesia, covering about 38093 hectares. Although there are enough water resources to meet current demands in the basin, many challenges including high spatial and temporal variability in precipitation from year to year exist. It is essential to understand how the climatic condition affects Lesti River stream flow in each sub basin. This study investigated the applicability of using the Soil and Water Assessment Tool (SWAT) with the incorporation of groundwater recharge prediction in stream flow simulation in the upstream Lesti watershed. Four observation wells in the upstream Lesti watershed were used to evaluate the seasonal and annual variations in the water level and estimate the groundwater recharge in the deep aquifer. The results show that annual water level rise was within the 2800 - 5700 mm range in 2007, 3900 - 4700 mm in 2008, 3200 - 5100 mm in 2009, and 2800 - 4600 mm in 2010. Based on the specific yield and the measured water level rise, the area-weighted groundwater predictions at the watershed outlet are 736, 820.9, 786.7, 306.4 mm in 2007, 2008, 2009, and 2010, respectively. The consistency test reveals that the R-square statistical value is greater than 0.7, and the DV (%) ranged from 32 - 55.3% in 2007 - 2010. Overall, the SWAT model performs better in the wet season flow simulation than the dry season. It is suggested that the SWAT model needs to be improved for stream flow simulation in tropical regions. 出版者： Taiwan: 中華民國地球科學學會出版日期： 2014-12-01 出處： TAO : Terrestrial, atmospheric, and oceanic sciences, 2014-12, Vol.25 (6), p.881-892 資源來源： Airiti Library (AL) 版權： 2014. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. 識別號： ISSN: 1017-0839 識別號： ISSN: 2223-8964 識別號： ISSN: 2311-7680 識別號： EISSN: 2311-7680 識別號： DOI: 10.3319/TAO.2014.07.25.01(Hy)
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