The impact of land use and climate change on surface runoff and groundwater in Cimanuk watershed, Indonesia

The impact of land use and climate change on surface runoff and groundwater in Cimanuk watershed, Indonesia
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土地利用和气候变化对印度尼西亚 Cimanuk 流域地表径流和地下水的影响

DOI:
10.1007/s10201-020-00629-9
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发表时间:
2020
期刊:
影响因子:
1.6
通讯作者:
Fakhrudin M.
Fakhrudin M.
中科院分区:
环境科学与生态学4区
文献类型:
--
作者:
Ridwansyah Iwan;Yulianti Meti;Apip;Onodera Shin-ichi;Shimizu Yuta;Wibowo Hendro;Fakhrudin M.

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Cimanuk 河从 Garut 摄政区流向 Indramayu 三角洲,总流域面积为 4010.8 平方公里,是西爪哇省最长的河。然而,气候变化、人口增长和沿海地区养鱼业的累积影响,持续对流域水资源的供应造成压力。因此,本研究旨在使用 SWAT 模型分析土地利用和气候变化对地表径流和地下水的影响。这是一种基于物理的半分布式水文模型,具有多种应用,特别是模拟水平衡和流域管理。本研究使用了2005-2008年的每日排放记录、2002-2017年的土地利用数据以及日本气象厅气象研究所从MRI-AGCM3.2 20公里检索到的模拟气候(1979-2003年)和预测气候数据(2075-2099年)。结果表明,SWAT模型的校准和验证表现出令人满意的水文模拟标准。建模期间显示,土地利用变化导致径流普遍增加,基流对年径流量的贡献下降。当前气候与预测气候之间的变化在某些年份表现出 Qmax/Qmin 比率的增加。
The Cimanuk River with a total watershed area of 4010.8 km2flowing from the Garut Regency to Indramayu Delta is the longest in West Java Province. However, the cumulative effects of climate change, increased population, and fish farming in the coastal area have continuously pressured the availability of water resources in its watershed. This study was, therefore, aimed to analyze the impact of land use and climate change on surface runoff and groundwater using a SWAT model. This is a physically based semi-distributed hydrological model with various applications, particularly to simulate water balance and watershed management. Daily discharge record for 2005–2008, land use data for 2002–2017, and the simulated climate (1979–2003) and projected climate data (2075–2099) retrieved from MRI-AGCM3.2 20-km by the Meteorological Research Institute of Japan Meteorological Agency were used in this research. The result showed that the calibration and validation of SWAT model have exhibited satisfactory criteria for hydrological simulations. The modeled period showed land use changes caused a general increase in runoff and decline in base flow contribution to annual streamflow. The changes between the current and projected climate exhibited increase inQmax/Qminratio in certain years.
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