[1]WANG Jiaqi,JIA Yanfeng.Variation of Runoff and Sediment in the Middle and Upper Reaches of Daling River During the Past 60 Years[J].Research of Soil and Water Conservation,2018,25(03):35-40.
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Variation of Runoff and Sediment in the Middle and Upper Reaches of Daling River During the Past 60 Years
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 03
Page number:
35-40
Column:
Public date:
2018-04-10
- Title:
- Variation of Runoff and Sediment in the Middle and Upper Reaches of Daling River During the Past 60 Years
- Keywords:
- runoff; sediment discharge; variation of runoff and sediment; control of soil and water loss; Daling River
- CLC:
- S157.1
- DOI:
- -
- Abstract:
- The western area of Liaoning has always been the focus of regional control of water and soil loss due to its serious soil erosion. Daling River is the largest one in the western area of Liaoning, therefore, analyzing the relationship between water and sediment, within the Daling River watershed, can provide a theoretical basis for both the control of water and soil loss and ecological construction of a certain watershed. Chaoyang hydrological station is located in the midstream of the river. The data of runoff and sediment discharge of the Daling River from 1960 to 2016, and the precipitation data from June to September, had been used to analyze the variation of runoff and sediment in the middle and upper reaches of Daling River during the past 60 years through applying the moving average and cumulative distance equal methods. The results showed that:(1) the mean annual runoff and sediment discharge had reached maximum value and the sediment changed obviously from 1960 to 1969; the variation of runoff also changed obviously from 2010 to 2016; (2) the runoff and sediment had the periodical characteristics; the variation of runoff showed 4 stages which were high flow period-low water period-high flow period-low water period; the variation of sediment discharge also showed 4 stages including rising period-changing period-rising period-declining period, the declining phase was longer than rising one in the changing period; (3) according to the liner trend, the variation of runoff and sediment have declined; (4) since 1993, several large scale solution of water and soil conservation had been implemented in the middle and upper reaches of Daling River, therefore, from 1993-2016, the runoff which was affected by human beings had decreased about 5 147 million m3, that was to say an average reduction of 214 million m3 each year, besides, the cumulative sediment discharge had decreased about 9 7031.5 thousand tons, which means an average reduction of 4 042.3 thousand tons each year, in a word, the implemented solutions of water and soil conversation, in the middle and upper reaches of Daling River in 1993, had achieved the remarkable results.
- References:
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1900-01-01