The streamflow trend in Tangwang River basin in northeast China and its difference response to climate and land use change in sub-basins
The streamflow trend in Tangwang River basin in northeast China and its difference response to climate and land use change in sub-basins
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DOI：
10.1007/s12665-012-1933-3
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发表时间：
2013-05
影响因子：
2.8
通讯作者：
Wenbin Liu;Tijiu Cai;G. Fu;Aijing Zhang;Changming Liu;H. Yu
中科院分区：
文献类型：
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作者：
Wenbin Liu;Tijiu Cai;G. Fu;Aijing Zhang;Changming Liu;H. Yu
利用Kendall检验分析了汤旺河流域1964-2006年的水文气候变化趋势。此外，使用土壤和水评估工具（SWAT）模型评估了气候变异性和土地利用变化对每个子流域径流的影响。结果表明，年平均流量和峰值流量呈不显著的减少趋势（−0.14 m3 s − 1 year −1，1%; −8.67 m3 s − 1 year −1，40%），而年低流量呈轻微增加趋势（0.02 m3 s − 1 year −1，11%）。相应地，整个流域的年降水量减少了0.02 mm，而日平均、最高和最低温度的年平均值分别显著增加了0.07、0.10和0.02 °C。另一方面，随着“天保工程”和“退耕还林（草）绿色工程”的实施，1980 - 2000年，西藏自治区森林面积共增加744.5 km 2（4.00%）。与此同时，草地和农田分别减少了378.0平方公里（-1.98%）和311.9平方公里（-1.63%）。总体而言，土地利用变化对SUB1、SUB 2和SUB 3径流量减少的影响大于气候变化，主要是草地、农田和裸地向森林的转化。相反，在SUB 4中，气候变率的影响占主导地位。研究结果可为变化环境下的水资源规划和管理提供参考。
In this study, the hydro-climatic trends (1964–2006) of Tangwang River basin (TRB) were examined using the Kendall’s test. Moreover, the impacts of climate variability and land use change on streamflow in each sub-basin were assessed using the Soil and Water Assessment Tools (SWAT) model. The results indicated that annual mean flow and peak flow showed insignificant decreasing trends (−0.14 m3s−1year−1, 1 %; −8.67 m3s−1year−1, 40 %), while annual low flow exhibited a slightly increasing trend (0.02 m3s−1year−1, 11 %). Correspondingly, the annual precipitation for the entire basin decreased by 0.02 mm year−2, while the annual means of daily mean, maximum and minimum temperature increased significantly by 0.07, 0.10 and 0.02 °C year−1, respectively. On the other hand, with the implementation of “Natural Forest Protection Project” and “Grain for Green Project”, the forests in TRB totally increased by 744.5 km2(4.00 %) from 1980 to 2000. Meanwhile, the grasslands and the farmlands decreased by 378.0 km2(−1.98 %) and 311.9 km2(−1.63 %), respectively. Overall, land use changes played a more important role for the streamflow reduction than climate change for SUB1, SUB2 and SUB3, in which the primary conversions were from grassland, farmland and bare land to forests. Conversely, in SUB4, the influence of climate variability was predominant. The results obtained could be a reference for water resources planning and management under changing environment.