国道112线丰宁县城至千松梁段扩建对水土流失的影响及对策

李金海; 杨莉琳

doi:11894/1005-829x.2001.21(3).32

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国道112线丰宁县城至千松梁段扩建对水土流失的影响及对策

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- 国道112线丰宁县城至千松梁段扩建对水土流失的影响及对策
- Influences and Countermeasures of Constructing Fengning Line ofm 112 National Road on Soil and Water Loss
- 水土保持通报 2001年20卷第3期页码：32-34
- 作者机构：
  
  1. 河北师范大学资源与环境研究所,河北,石家庄,050016
  2. 中国科学院石家庄农业现代化研究所,河北,石家庄,050021
- 作者简介：
- 基金信息：
  
  河北省环保局资助“公路建设对生态环境影响研究”(L20009)
- DOI：11894/1005-829x.2001.21(3).32
  中图分类号：
- 纸质出版：2001
- 稿件说明：
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李金海, 杨莉琳. 国道112线丰宁县城至千松梁段扩建对水土流失的影响及对策[J]. 水土保持通报, 2001,20(3):32-34.

LI Jin hai, YANG Li lin. Influences and Countermeasures of Constructing Fengning Line ofm 112 National Road on Soil and Water Loss[J]. Bulletin of Soiland Water Conservation, 2001, 20(3): 32-34.
李金海, 杨莉琳. 国道112线丰宁县城至千松梁段扩建对水土流失的影响及对策[J]. 水土保持通报, 2001,20(3):32-34. DOI： 11894/1005-829x.2001.21(3).32.

LI Jin hai, YANG Li lin. Influences and Countermeasures of Constructing Fengning Line ofm 112 National Road on Soil and Water Loss[J]. Bulletin of Soiland Water Conservation, 2001, 20(3): 32-34. DOI： 11894/1005-829x.2001.21(3).32.

摘要

国道112线丰宁段处于半湿润半干旱的气候条件下，当地植被覆盖率低，土壤为黄土质母质，结构松散，黏结力差。该段公路长58.4km，路线宽度从6～8m扩建为12m. 公路建设只在一定时期内对水土流失有影响，且不同部分影响时间不同，确定各部分的影响时间为路面1a，取土场、弃土场和路基边坡为5a，临时占地为 3a. 根据不同地貌条件下侵蚀模数、面积等计算的原地貌条件下的水土流失量为748.0t，影响期内的年水土流失量为 1456.1t. 由公路建设引起的水土流失量为 708.1t. 主要是由于弃土场和公路边坡引起。减轻水土流失的措施对弃土场修建挡渣墙整理后种草植树。对路边坡进行植物护坡。

Abstract

Fengning line of the 112 national road

where the climate belongs to the semi-humid and semiarid zone

the vegetation is lower and soil is porous because of its loess parent textile. This road is 58. 4km in length

and 6 ～ 8 m in width

which will be reconstructed to 12 m. Constructing road affects the loss of soil and water only in some fixed period

and the affecting time is different in different part of soil

such as it is l a in pavements

5a in places where soilswere used to road construction

or places where soils were discarded on the road sides and slopes

3a in temporary occupied places. According to the erosion modulus and areas under different condition

before the road was constructed

the loss of soil and water from road making is784. 0 t/a

and will be 1456. 1t/a during constructing period. So

the loss of soil and water from road making is 708. 1 t/a

which is mainly resulted from discarded soils

roadsides or slopes. The measure is building walls to block the discarded soils

and plant trees and grasses in them or in the road sides and slopes.

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