Subjects: Geosciences >> Geography submitted time 2025-07-14 Cooperative journals: 《干旱区研究》
Abstract： Water resources form the foundation for maintaining ecosystem balance and ensuring human life and economic development. Simulating hydrological processes in arid and semi-arid ecosystems promotes the effective utilization of local water resources. This paper analyzed the applicability of two models—the Distributed Hydrology Soil Vegetation Model (DHSVM) and the Soil and Water Assessment Tool (SWAT)—in different types of watersheds in semi-arid regions by performing: (1) sensitivity analysis and parameter calibration; (2) simulation of monthly runoff for the upper reaches of the Xar Moron River and the Laoha River during the growing seasons of 2011–2012 and 2017–2019. The upper reaches of the Xar Moron River are dominated by grasslands, while those of the Laoha River are dominated by forestland and farmland. The results show that DHSVM exhibits 7 primary sensitive parameters in the Xar Moron River and 6 in the Laoha River, whereas SWAT identifies 11 and 12 sensitive parameters, respectively. Following parameter calibration, in the upper reaches of the Xar Moron River the Nash–Sutcliffe efficiency coefficient for DHSVM is 0.70 during calibration and 0.11 during validation, while for SWAT it is 0.43 and 0.04, respectively. In the upper reaches of the Laoha River, the Nash–Sutcliffe efficiency coefficients for DHSVM are 0.56 and 0.70 during the two periods, compared with 0.86 and 0.54 for SWAT. The findings indicate that both models are applicable for simulating hydrological processes in the study area, with DHSVM more accurately simulating overall runoff and SWAT more accurately simulating peak monthly runoff.
Subjects: Geosciences >> Geography submitted time 2024-12-16
Abstract： This study is based on the meteorological station measured data from 1980 to 2020, hydrological station measured runoff data, and future climate model of CMIP6 in the Jinghe River Basin. The CMIP6 climate data is processed using Delta downscaling method, coupled with the SWAT (Soil and Water Assessment Tool) hydrological model, to explore the variation characteristics of blue-green water under climate change in the basin. The results showed that under the SSP1-2.6 pathway, the blue-green water content in the study area showed insignificant upward trend, Under the SSP3-7.0 pathway, the blue water content in the study area showed a insignificant downward trend, while the green water content showed a significant upward trend; Under the SSP5-8.5 pathway, the blue water content showed a insignificant downward trend, the green water content showed a insignificant upward trend too. The average annual blue water volume under the three paths has decreased compared to the historical period, with annual average blue water volumes of 128.8 mm, 117.2 mm, and 126 mm, respectively. The average annual green water volume has increased, with green water volumes of 372.7 mm, 369.3 mm, and 372.1 mm, and the green water coefficient is higher than that of the historical period. The spatial distribution characteristics of blue-green water are increasing from northwest to southeast, and the spatial distribution characteristics of blue-green water between each path are basically the same.
Peer Review Status:
Awaiting Review
Subjects: Geosciences >> Geography submitted time 2024-09-05 Cooperative journals: 《干旱区地理》
Abstract：气象数据是水文过程研究的关键因素，但是因为流域地形复杂，上游没有足够实测数据的气象站点，流域水文过程研究在较大程度上受到了限制。以玛纳斯河流域为研究区，研究对象选取CMFD、ERA5-Land和CFSR 3种再分析数据，构建基于物理过程的SWAT模型和基于数据驱动的AdaBoost 模型，验证不同数据集在2种类型水文模型中径流模拟的适用性，选用纳什效率系数（NSE）和决定系数（R2）进行定量分析。结果表明:（1）数据集在AdaBoost 模型中的表现要好于SWAT模型，各数据集和气象站NSE与R2均有所提升，AdaBoost模型由于对输入数据的限制更少其更适用于资料缺乏地区。（2）验证期ERA5-Land 在2 种模型中拟合效果均为最好（ERA5-Land+SWAT：NSE=0.83，R2=0.85；ERA5-Land+AdaBoost：NSE=0.87，R2=0.87），再分析数据集ERA5-Land可为西北实测气象资料不足的干旱区径流模拟提供参考。
Subjects: Geosciences >> Geography submitted time 2023-09-27 Cooperative journals: 《干旱区地理》
Abstract：冰川径流是西北干旱区径流的主要组成部分，研究未来气候变化对冰川径流的影响对西北干旱区径流至关重要。以博尔塔拉河上游源流区为研究区，构建嵌入冰川模块的SWAT模型，模拟温泉水文站19722018年月径流过程，并在此基础上研究了气候变化情景下（RCP4.5和RCP8.5）未来（20202050年）气候变化对冰川径流的影响。结果表明：SWAT模型能够很好地模拟源流区径流变化过程，在整个模拟期间，径流数据的纳什系数（NSE）为0.82，偏差百分比（PBIAS）为-3.22%，均方根误差与实测值标准差的比值（RSR）为0.42，决定性系数（R2）为0.84，模型性能评定为优。根据CMIP5气候模式2种情景的模拟结果，2种情景模拟未来总径流都呈现出增加趋势，分别将以0.31108 m3（10a）-1和0.40108 m3（10a）-1的速度继续增加，冰川径流占比较历史时期的27.61%分别提升了4.84%和9.38%。冰川径流增加是径流量增加的主要原因。通过相关性分析发现，随着气温的升高，冰川消融时间提前，冰川消融加速，冰川积累时间减少，导致冰川面积进一步的缩减。研究结果可为博河地区水文资料历史变化、未来演变趋势和预防气候变化带来的潜在风险提供依据。
Subjects: Geosciences >> Hydrology submitted time 2023-03-28 Cooperative journals: 《干旱区研究》
Abstract： Water shortage has become a major resource and environmental challenge worldwide. Climate and land use change have made the evolution of current hydrological factors complex and uncertain. Exploring the spatial distribution characteristics of hydrological factors under dynamic scenarios is of vital theoretical and practical significance for the sustainable development of regional economy and society. The meteorological and hydrological data of the Datong River source region from 1960 to 2019 were used in this study to quantitatively analyze the spatial distribution characteristics of hydrological elements under climate and land use change scenarios based on model simulation and scenario segmentation. The results showed that: (1) After calibration and verification of the SWAT model, the coefficient of determination, Nash coefficient, and percentage bias (PBIAS) all met the model requirements of 0.81%, 0.79%, and −0.8% in the rate period, and 0.81%, 0.75%, and 15.8% in the validation period, respectively, which indicated that the model had good applicability in the headwaters of the Chase River. (2) Obvious spatial heterogeneity of hydrological elements was detected in the headwater area of Datong River, and a single hydrological element could not represent the overall spatial distribution. Precipitation, potential evapotranspiration, and soil water content decreased with the increase in altitude, while surface runoff and water yield increased with the increase in altitude. (3) The spatial distribution of hydrological factors under the three scenarios were generally consistent, while the spatial distribution of water yield was greatly affected by the land use change. Under the climate change scenario, the actual evapotranspiration and soil water content showed a downward trend, while the surface runoff and water yield showed an upward trend. Under the land use change scenario, the changes of hydrological elements were contrary to these observations.
Subjects: Geosciences >> Hydrology submitted time 2023-03-13 Cooperative journals: 《干旱区研究》
Abstract： The Ulagai River Basin in Inner Mongolia is a typical inland river basin in the pastoralist grasslands of the arid and semi-arid regions with extremely fragile ecosystems, and climate warming and human activities can directly affect hydrological changes. In this study, we used the improved SWAT (Soil and Water Assessment Tool) hydrological model, M-K trend test, precipitation-runoff double accumulation curve, and scenario analysis to systematically analyze the spatial and temporal characteristics of runoff in the Ulagai River Basin from 1981 to 2020 and to quantify the differences between climate change and human activities on runoff in different periods and river sections. The differences in the impact of climate change and human activities on the runoff in different periods and river sections were quantified. The results show that the SWAT model significantly impacted runoff in the Ulagai River Basin from 1981 to 2020. The results show that the SWAT model has good applicability in the Ulagai River Basin, with NSE and R2 above 0.62 and PBLAS less than 18.8% for both the periodic and validation periods. Under the warm and dry trend of the basin in the past 40 years, the runoff volume decreased significantly in the upper, middle, and lower reaches, then a sudden change occurred in 2000. Considering the contribution of human activities such as climate change and overgrazing, blind reclamation and construction of water conservancy reservoirs to the change of runoff in the basin was 95.84% and 4.16%, respectively. Also, the contribution of human activities to different river segments in the basin varied, with 1.69%, 4.36%, and 5.03% from upstream to downstream. The contribution rates also differed significantly across different periods, from 88.26% in 1980 to 25.47% in 2020. The trend and magnitude of runoff changes due to different human activity patterns in different periods also differed. This study’s results can provide a reference basis for the sustainable use and rational scheduling of water resources in the inland river basin of pastoral grasslands.
Subjects: Geosciences >> Atmospheric Sciences submitted time 2021-10-10 Cooperative journals: 《干旱区地理》
Abstract： 以叶尔羌河流域上游河源区为研究区，构建嵌入了冰川模块的 SWAT 分布式水文模型，对 卡群水文站 1968—2017 年逐月径流进行模拟，评价该模型在研究区内的适用性，基于模拟结果分 析研究区冰川径流年际变化与年内分布情况，并定量核算气候和下垫面变化对径流变化的贡献 率。结果表明：该模型在研究区径流模拟中具有良好的适用性，校准期（1968—1992 年）与验证期（1993—2017 年）的决定系数（R2）分别为 0.77 和 0.86，纳什系数（NSE）分别为 0.76 和 0.85，均方根误 差与实测值标准差的比值（RSR）分别为 0.49 和 0.38，偏差百分比（PBIAS）分别为-7.4%和 0.6%。经 模拟，研究区近 50 a 冰川径流量总体呈增加趋势，且其占总径流量的比重约为 51.1%；年内冰川产 流主要发生在 6—9 月，占全年冰川径流量的 90.0%以上。气候和下垫面变化分别使月径流量增加 6.62 m3·s-1 和 0.41 m3·s-1，其中气候变化的贡献率为 94.2%，即气候变化对研究区径流的影响占主导 地位。研究成果可为理解研究区的历史径流变化成因及预测未来径流的演变趋势提供科学依据。
Subjects: Geosciences >> Geography submitted time 2021-06-13 Cooperative journals: 《干旱区研究》
Abstract：以开都河流域为例，以SWAT（Soil and Water Assessment Tool）分布式水文模型和标准化降水蒸散指数（SPEI）为基础，对干旱变化特征进行识别。利用贝叶斯动态线性方程（BDL）模型研究南方涛动（SOI）等气候驱动因子对区域季节性干旱的影响。结果表明：1965—2016年开都河流域的干旱主要集中于冬、春季；在不同季节，流域干旱的变化趋势也有所不同，但趋势并不明显，仅在秋冬季可以检测出显著下降的趋势；不同季节的SPEI指数变化受降水、潜在蒸散发等气候因素的响应较快，多在0值上下波动，导致其变化周期较短，多集中在2~4 a；气候指数对流域干湿变化的影响随着时间的推移而转变，对不同季节的影响也有所不同。
Subjects: Geosciences >> Hydrology submitted time 2020-06-12 Cooperative journals: 《干旱区地理》
Abstract： 基于遥感与GIS技术的研究进展，采集洮河流域高程数据、土地利用类型、土壤类型特性、气象数据等，在SWAT模型中模拟与面源污染有关的降水、地表径流、壤中流、下渗和蒸散发等水文过程，计算侵蚀量、总氮和总磷等面源污染负荷，研究洮河流域面源污染特征。研究表明：洮河流域多年平均侵蚀量为0.70×108 t，多年平均总氮面源污染负荷为244.11 t，洮河流域多年平均总磷面源污染负荷为27.91 t，洮河流域1967—2017年多年平均侵蚀量、总氮面源污染、总磷面源污染负荷总体呈不明显的波动减少趋势，同时提出了改变土地利用方式、设置植被过滤带、坡改梯等面源污染防治对策及建议。
Hits
Hits
Downloads
Comment
YES