Attributing climate variability, land use change, and other human activities to the variations of the runoff-sediment processes in the Upper Huaihe River Basin, China

IF 4.7 2区 地球科学 Q1 WATER RESOURCES
Chong Wei , Xiaohua Dong , Yaoming Ma , Kang Zhang , Zhigang Xie , Zhikai Xia , Bob Su
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引用次数: 0

Abstract

Study regions

The Wangjiaba (WJB) watershed, located in the upper Huaihe River Basin in China.

Study focus

An attributing framework has been proposed combining the Double Mass Curve (DMC) and the Soil and Water Assessment Tools (SWAT) model to identify the contributions of climate variability, Land use (LU) change, and Other Human Activities (OHA) to the variations in runoff-sediment processes within the WJB.

New hydrological insights for the region

The studied period was able to be separated into three sub-periods (P1: 1981–1991, P2: 1992–2009, and P3: 2010–2019) using the DMC, and the SWAT model could simulate runoff and Sediment Yields Load (SYL) properly during different sub-periods after calibration. Generally, the runoff, SYL, and Suspended Sediment Concentration (SSC) within the WJB exhibited a decrease trend with a change rate of −1.3 mm a−1, −8.49×104 t a−1, and −0.01 kg m−3 a−1, respectively. Substantially, climate variability decreases runoff, SYL, and SSC from P1 to P3; LU change decreases runoff, SYL, and SSC from P2 to P3; OHA decreases SYL and SSC from P1 to P2, but increases SYL and SSC from P2 to P3. It should be noticed that the OHA has increased the SYL significantly especially over the downstream of WJB from P2 to P3. It is essential to enhance soil erosion prevention measures in the future under the background of global climate change.

中国淮河流域上游径流-沉积过程变化的气候变异、土地利用变化及其他人类活动归因
研究重点结合双质量曲线(DMC)和水土评估工具(SWAT)模型,提出了一个归因框架,以确定气候变异、土地利用(LU)变化和其他人类活动(OHA)对王家坝流域径流-沉积过程变化的贡献。对该地区水文的新认识利用 DMC 可将研究时段划分为三个子时段(P1:1981-1991 年、P2:1992-2009 年和 P3:2010-2019 年),SWAT 模型在校准后可正确模拟不同子时段的径流和泥沙产量负荷(SYL)。总体而言,WJB 流域内的径流、泥沙产状负荷和悬浮泥沙浓度(SSC)均呈下降趋势,变化率分别为-1.3 mm a-1、-8.49×104 t a-1和-0.01 kg m-3 a-1。从总体上看,气候变异减少了 P1 至 P3 的径流、SYL 和 SSC;LU 变化减少了 P2 至 P3 的径流、SYL 和 SSC;OHA 减少了 P1 至 P2 的 SYL 和 SSC,但增加了 P2 至 P3 的 SYL 和 SSC。值得注意的是,OHA 显著增加了 SYL,尤其是在 P2 至 P3 的 WJB 下游。在全球气候变化的背景下,未来加强水土流失预防措施至关重要。
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来源期刊
Journal of Hydrology-Regional Studies
Journal of Hydrology-Regional Studies Earth and Planetary Sciences-Earth and Planetary Sciences (miscellaneous)
CiteScore
6.70
自引率
8.50%
发文量
284
审稿时长
60 days
期刊介绍: Journal of Hydrology: Regional Studies publishes original research papers enhancing the science of hydrology and aiming at region-specific problems, past and future conditions, analysis, review and solutions. The journal particularly welcomes research papers that deliver new insights into region-specific hydrological processes and responses to changing conditions, as well as contributions that incorporate interdisciplinarity and translational science.
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