The preliminary studies on the Landform and soil and water loss in Zhengning county

Zhao Shangxue; Li Honglian

您当前的位置：

首页 >

文章列表页 >

The preliminary studies on the Landform and soil and water loss in Zhengning county

- The preliminary studies on the Landform and soil and water loss in Zhengning county
- Bulletin of Soiland Water Conservation Vol. 8, Issue 6, Pages: 45-49(1989)
- 作者机构：
  
  中国科学院兰州冰川冻土研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：1989
- 稿件说明：
移动端阅览
Zhao Shangxue, Li Honglian. The preliminary studies on the Landform and soil and water loss in Zhengning county[J]. Bulletin of Soiland Water Conservation, 1989, 8(6): 45-49.
DOI：

Zhao Shangxue, Li Honglian. The preliminary studies on the Landform and soil and water loss in Zhengning county[J]. Bulletin of Soiland Water Conservation, 1989, 8(6): 45-49. DOI：

摘要

本文根据地质地貌特征

对正宁县的水土流失的形式、类型以及成因作了较详细的论述和分析。认为该县水土流失的形式主要有水力侵蚀和重力侵蚀

其中以水力侵蚀为主。侵蚀类型与山坡坡度、植被密度、侵蚀模数的高低以及地形的变化有关

得出本县侵蚀强度和水流输沙量自东向西有规律地递增

年侵蚀模数由东部林区的低于500吨/平方公里向西部的6

000吨/平方公里增加。由此推断了水土流失的原因是:支离破碎、千沟万壑和梁峁起伏的特殊地形;软硬相间的地层结构和集中的降水;活跃的新构造运动以及人类不合理的开发利用等。

Abstract

According to the geological and geomorphical characters

this paperexpounds and analyses the forms

types and causes of soil and water lossof Zhengning county in Gansu province in detail. It thinks that themain forms of soil and water loss in this county are hydraulic and gravi-tational erosions

hydraulic erosion is the leading one.The types of erosionrelates to the angle of hill slope

vegetation density

erosion modulus

strength and the sand discharge carried by water current keeping increasingfrom east to west in this county

the modulus of erosion increases fromless than 500t/km2·y in the east forest area to 600t/km2·y in the west.Based on above analysing

the authors deduce that the causes of soil andwater loss are the special landform with the deep cut gullies

the strati-graphic structure with soft rocks accompanied with hard rocks

the con-centrated rainfall

the active new tectonic movement and unreasonableexploring and utilizing by mankind

etc.

关键词

Keywords

references

Views

1275

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Research progress and trends of ecological environment of key lakes in Yangtze River economic belt based on bibliometric analysis

Characteristics of wind-sand environment and gully entering process in Shajiawan small watershed in middle reaches of Yellow River

Construction of ecological security pattern at Zhangjiakou section of Bashang region based on landscape connectivity optimization

Effects of land use and climate change on water-related ecosystem services in Hebei Province

Effects of vegetation restoration duration on runoff and sediment yield in slopes of waste dumps in alpine mining areas

Related Author

No data

Related Institution

No data

⁰