Relationship Between Rainfall Specification in Semiarid of Level-terrace Preparation and Loess Hilly Region

SUN Hao-feng; CHEN Tian-lin

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Relationship Between Rainfall Specification in Semiarid of Level-terrace Preparation and Loess Hilly Region

- Relationship Between Rainfall Specification in Semiarid of Level-terrace Preparation and Loess Hilly Region
- Bulletin of Soiland Water Conservation Vol. 32, Issue 6, Pages: 28-31(2013)
- 作者机构：
  
  1. 甘肃省水土保持科学研究所,甘肃,兰州,730020
  2. 甘肃省水利厅水土保持局,甘肃,兰州,730000
- 作者简介：
- 基金信息：
- DOI：
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- Published：2013
- 稿件说明：
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SUN Hao-feng, CHEN Tian-lin. Relationship Between Rainfall Specification in Semiarid of Level-terrace Preparation and Loess Hilly Region[J]. Bulletin of Soiland Water Conservation, 2013, 32(6): 28-31.
DOI：

SUN Hao-feng, CHEN Tian-lin. Relationship Between Rainfall Specification in Semiarid of Level-terrace Preparation and Loess Hilly Region[J]. Bulletin of Soiland Water Conservation, 2013, 32(6): 28-31. DOI：

摘要

以半干旱区甘肃省榆中县孙家岔流域5种不同下垫面条件下的径流小区为研究对象

对小区6a的自然降雨产流观测资料进行了分析

研究了半干旱黄土丘陵区水平阶整地规格与降雨量的关系。研究结果表明

刈割草地较荒坡地的径流量增加了9.77%~24.87%灌木措施(甘蒙柽柳小区、柠条小区)径流量较荒坡地可减少8.28%~60.57%和12.24%~78.41%次降雨的产流深(草灌小区)与降雨强度具有很好的线性关系水平阶则可以完全拦蓄降雨。在15°~25°坡地上配套水平阶的设计宜按5年一遇最大6h降雨进行

此时若埂高为0.1m

其允许最大坡长为3.9~8.2m。适当加高水平阶埂高

可提高防御标准和防护面积。

Abstract

The runoff in five different surfaces was observed in Sunjiacha basin of Yuzhong County in Uansu Province

and the relationship between specification of leve-terrace preparation and rainfall in semiarid loess hilly region was studied.The results showed that the runoff in mowing grass plot was 9.77%-24.87% higher than that in original barren slope plot.In comparison with barren slope plot

Tamarix mongolica plot and Caragana microphylla plot were capable of decreasing the runoff for 8.28%-60.57%and 12.24%-78.41%

respectively.The depth of runoff after individual rainfall had a great linear relationship with rain-fall intensity.The level terraces were definitely able to increase the rainfall conversation.The configuration of level terraces should be under the consideration of maximum 6 h rainfall within five years.In this case

the level terraces ridge should be 0.1 m

with the slope length of 3.9-8.2 m.Heightening the ridge properly will raise the efficiency and protection area of level terraces.

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Related Institution

College of Soil and Water Conservation, Beijing Forestry University

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State Key Joint Laboratory of Environmental Simulation and Pollution Control, Institute of Environmental Sciences, Beijing Normal University

Bureau of Hydrology, YRCC, Zhengzhou 450003, He’nan Province

State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling District

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