| 摘要: |
| 摘要：为搞清清水河流域不同时期、年际及年内水沙量变化特点，以清水河流域固原、韩府湾和泉眼山三个水文站长系列实测水沙资料为基础，采用实测资料统计分析研究方法，对水沙量进行系统分析，并利用Mann-Kendall突变检验研究方法确定了各站年水沙突变点年份。研究表明：与长时期相比，近期2010-2015年除泉眼山站水量增加6.2%之外，其它各站水沙量均减少，水沙减少范围分别为58.8％～65.7％和64.3%～94.4%，沙量减幅大于水量减幅。清水河流域年水量的58.5%～65.6%和年沙量的85.6%～89.4%都集中在汛期，年际间水沙丰枯悬殊。各站年径流量和输沙量突变时间存在差异性,各站水沙量近期呈减少趋势。同时也对影响清水河流域水沙条件变化的降雨量、坡面水土保持措施、水库运用和淤地坝建设等因素进行了初步分析。该研究成果可为黄河上游水沙调控及河道治理提供技术参考。 |
| 关键词: 水沙量 水沙变化 突变检验 清水河流域 宁夏河段 |
| DOI： |
| 分类号: |
| 基金项目:国家重点研发计划(2017YFC0404402)；中央级公益性科研院所基本科研业务费专项资金资助项目(HKY-JBYW-2018-11) |
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| Analysis on the characteristics of flow and sediment variation in Qingshuihe River Basin of Ningxia |
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Majinguo1, zhengyanshuang2, zhangxiaohua2, fengqing2
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1.Soil and Water Conservation workstation of Guyuan City, Ningxia;2.Yellow River water conservancy Research Institute of Yellow River Water Conservancy Commission
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| Abstract: |
| Abstract: Due to achieve the variant quantity characteristics of flow and sediment in Qingshuihe River Basin at different times, including flood and non-flood seasons, inter annual and intra seasonal, the variation process of flow and sediment volume is analyzed systematic with the method of applied statistics for filed data. The long-series measured materials contain the flow and sediment data gained at three hydrological stations, namely, Guyuan, Hanfuwan and Quanyanshang sites. The change-point analysis of hydrological time series is implemented with Mann-Kendall method for obtaining the mutation year for each hydrological station. The results indicate that the mutation time of each station is asynchronous for annual runoff and sediment load. Moreover, the amount of water and sediment in each station is decreasing in recent years. Compared with the tendency in long term, the water volume increased by 10% in 2010-2015 at Quanyanshang station and decreased at other stations. The range of water and sediment reduction is 58.8％～65.7％and 64.3%～94.4%, respectively. It occurred at flood seasons in Qingshuihe River Basin that 58.5%～65.6% of annual water volume and 85.6%～89.4% of annual sediment volume. The distinction of water and sediment in wet season and dry season is significant for inter-annual. A preliminary analysis is underway for the factors affecting discharge and sediment supply, consisting of the rainfall, the slope soil-water conservation engineering, and reservoir operation mode and silt arrester construction. The research results could provide scientific and technological support for water-sediment regulation control and river regulation in the upper reaches of the Yellow River.
Keywords: Discharge and sediment load; Variation process of flow and sediment; Mutation test; Qingshuihe River Basin; Ningxia reach of the Yellow River |
| Key words: volume of water and amount of sediment water and sediment characteristics abrupt change test Qingshui River Basin. Ningxia Reach |
