Sediment Delivery Ratio and Spatial Scale Effect of Small Watershed in the Hilly Area of Central Sichuan Province

GAO Xu-biao; SUN Hou-cai; ZHAO Yong-jun; GAO Zhao-liang

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Sediment Delivery Ratio and Spatial Scale Effect of Small Watershed in the Hilly Area of Central Sichuan Province

- Sediment Delivery Ratio and Spatial Scale Effect of Small Watershed in the Hilly Area of Central Sichuan Province
- Bulletin of Soiland Water Conservation Vol. 26, Issue 6, Pages: 130-151(2007)
- 作者机构：
  
  1. 水利部水土保持监测中心
  2. ,陕西,西安,710021
  3. 长江科学院水土保持研究所
  4. 西北农林科技大学
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2007
- 稿件说明：
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GAO Xu-biao, SUN Hou-cai, ZHAO Yong-jun, et al. Sediment Delivery Ratio and Spatial Scale Effect of Small Watershed in the Hilly Area of Central Sichuan Province[J]. Bulletin of Soiland Water Conservation, 2007, 26(6): 130-151.
DOI：

GAO Xu-biao, SUN Hou-cai, ZHAO Yong-jun, et al. Sediment Delivery Ratio and Spatial Scale Effect of Small Watershed in the Hilly Area of Central Sichuan Province[J]. Bulletin of Soiland Water Conservation, 2007, 26(6): 130-151. DOI：

摘要

应用分形理论空间尺度效应原理

采用

137

Cs同位素示踪法测定小流域多年平均侵蚀模数和调查紫色土丘陵区不同小流域多年平均淤积模数的方法

探讨了泥沙输移比与小流域集雨面积的关系

得出了长江上游川中紫色土丘陵区小流域泥沙输移比空间尺度效应泥沙输移比(SDR)统计模型。经验证

该模型可用于估算紫色土丘陵区资料短缺小流域的输移比和产沙量。

Abstract

According to the basic principles of fractal theory and spatial scale effect

Cesium- 137 isotope tracer technique was used to measure annually averaged soil erosion modulus of small watershed in the hilly area wit h pu rple soil in Cent ral Sichuan Province.Moreover

annually averaged deposition modulus of differ- ent small watersheds was investigated.The relation of sediment delivery ratio to rainwater collection area of small watershed was discussed.The statistical model of the relation between sediment delivery ratio and spa- tial scale effect !If small watershed was constructed.The model can be used to estimate sediment delivery ra- tio and sediment yield of small data-lacked watershed in the hilly area with pu rple soil.

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