Sediment Delivery Ratio in Different Spatial Scale Watershed in Loess Hill-gully Region

WANG Zhi-jie; MA Li-mei; JIAO Ju-ying

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Sediment Delivery Ratio in Different Spatial Scale Watershed in Loess Hill-gully Region

- Sediment Delivery Ratio in Different Spatial Scale Watershed in Loess Hill-gully Region
- Bulletin of Soiland Water Conservation Vol. 32, Issue 6, Pages: 1-8(2013)
- 作者机构：
  
  1. 中国科学院水利部水土保持研究所陕西杨凌,712100
  2. 湖北省水利水电科学研究院,湖北,武汉,130070
  3. 西北农林科技大学水土保持研究所陕西杨凌,712100
- 作者简介：
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- DOI：
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- Published：2013
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WANG Zhi-jie, MA Li-mei, JIAO Ju-ying. Sediment Delivery Ratio in Different Spatial Scale Watershed in Loess Hill-gully Region[J]. Bulletin of Soiland Water Conservation, 2013, 32(6): 1-8.
DOI：

WANG Zhi-jie, MA Li-mei, JIAO Ju-ying. Sediment Delivery Ratio in Different Spatial Scale Watershed in Loess Hill-gully Region[J]. Bulletin of Soiland Water Conservation, 2013, 32(6): 1-8. DOI：

摘要

泥沙输移比是定量表征流域内侵蚀产沙-河道输沙特征的重要指标。探讨了不同尺度流域泥沙输移比计算的可能性与方法

以黄土丘陵沟壑区的径流小区、小流域、水文站实测资料为基础

利用径流小区观测资料和单元小流域侵蚀模数2种方法

对4种空间尺度流域的泥沙输移比进行了估算。结果表明:(1)对于面积在10~100km

的小流域

利用2种方法计算的泥沙输移比结果非常接近

说明在没有小区观测资料时

用单元小流域计算流域泥沙输移比是可行的。(2)对于土壤侵蚀类型单一的水文站控制流域

在没有面积>1km

单元小流域资料的情况下

可以用面积1~10km

小流域或面积10~100km

小流域作为单元小流域来计算泥沙输移比而对于侵蚀类型不同的支流其误差范围有些偏大。(3)流域治理措施的实施对于泥沙输移比的减少具有明显的效果

但治理措施减沙效应的发挥具有一定的滞后性。

Abstract

Sediment delivery ratio(SDR) is the important indicator to represent the basin soil erosion and sediment:one of the sediment transport characteristics.Based on the measured data of runoff plots

small watersheds and hydrological stations of loess hill gully region

using the methods of runoff plots measured data and unit watershed erosion modulus

the SDR of 4 spatial scales were analyaed.The results showed that:(1)The SDR of watersheds between area of 10 and 100 km2 was approximated by two methods estimated.It was feasible to use unit watershed materials to calculate SDR

while there was no runoff plots data.(2)For the hydrological station controlled watershed

it could take the watersheds between 1 and 100 kmz as the unit watershed to calculate SDR while there was no material of watershed below 1km2.However

it has too large error for tributary of different erosion types.(3)Watershed management measures have obvious effect for reducing SDR

but its effect has a degree of lags.

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Related Institution

Department of Hydraulic Engineering,Tongji Univetsity

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