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[1]DONG Yuting,WANG Shuangyin,MU Xingmin,et al.Assessment on Impact of Ecological Management on Runoff Evolution Based on IHA-RVA Method[J].Research of Soil and Water Conservation,2023,30(02):193-200.[doi:10.13869/j.cnki.rswc.2023.02.029]

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Assessment on Impact of Ecological Management on Runoff Evolution Based on IHA-RVA Method

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 02 Page number: 193-200 Column: Public date: 2023-03-10

Title:: Assessment on Impact of Ecological Management on Runoff Evolution Based on IHA-RVA Method

Author(s):: DONG Yuting¹, WANG Shuangyin¹, MU Xingmin^2,3, WANG Zhe¹; (1.College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China; 3.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China)

Keywords:: runoff evolution; ecological governance; IHA-RVA; cause analysis; upper reaches of Beiluo River

CLC:: P333; TV121.4

DOI:: 10.13869/j.cnki.rswc.2023.02.029

Abstract:: The evolution of runoff and its response to ecological management can provide paramount guidance for the reasonable use of water resources and the management of water ecological at basin scale. With the help of daily average streamflow and yearly precipitation data from 1964 to 2014 in the upper reaches of Beiluo River, we analyzed and investigated the processes of streamflow changes using the methods of double cumulative curve, double moving average(MASH), and Mann-Kendall trend test. Moreover, the 30 streamflow indicators of 5 groups and their change degrees were evaluated utilizing the range of hydrological indicators change method(IHA-RVA), and a preliminary analysis was done for the causal of streamflow evolution. The annual streamflow showed the decreasing trend during the study period. Taken the years of 1979 and 2002 as the time nodes, the study period could be divided into the baseline period, the conservation management of soil and water period, and the impact of ecological restoration period. Compared with the non-flood season, the streamflow decreased by 35.6% in the flood season. Under the influence of ecological management, the overall change degree of hydrology caused by the streamflow index was 74.35%. Among the 30 streamflow indexes in the 5 groups, the proportion of index with the pronounced changes increased. The mostly changed degree was the group of annual extreme streamflow that the proportion accounted for 94.77%. Significantly reduced streamflow and its fluctuation could be resulted from the human activities, in which the key drivers were the conservation of water and soil and returning farmland to forest or grassland.

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Last Update: 2023-03-10