摘要
为有效保持水土,减少生产建设项目扰动地表造成的水土流失,评价工程堆积体不同堆置方式的水土流失效应。试验基于WEPP模型,以洋县某建设项目为例建立模型数据库,分析工程弃土在设计土方量和占地面积条件下直线型、折线型、台阶型工程堆积体坡面土壤侵蚀规律,探寻不同堆置方式下堆置坡度的最优组合。结果发现:(1)底坡坡角α_(1)=26°时,直线型工程堆积体坡面土壤侵蚀强度最弱。(2)折线型工程堆积体最优边坡组合为α_(1)=47°,上部坡角α_(2)=22°。(3)台阶型工程堆积体在满足设计要求的前提下最优边坡断面组合为α_(1)=47°,α_(2)=24.5°,马道宽d=0 m。研究结果可为减少生产建设项目工程堆积体水土流失量、综合评估区域水土流失现状提供技术支撑和理论依据。
To reach the aim of soil and water conservation,the reduction of soil and water loss caused by the construction of production and construction projects,the effects of soil erosion caused by different stacking methods of engineering accumulations were evaluated.The experiment was based on the Water Erosion Prediction Project(WEPP)model,taking a construction project in Yang County as an example to establish a model database to explore the law of soil erosion on the slope surface of the engineering accumulation of straight,broken,and stepped engineering under the conditions of constant earthwork and floor space,and to explore the optimal combination of stacking slopes under different stacking methods.The results showed that:(1)The bottom slope angleα_(1)where the soil erosion intensity of the slope surface of the linear engineering accumulation body is weakest is 26°.(2)The optimal slope combination of the broken-line engineering accumulation body isα_(1)=47°,and the upper slope angleα_(2)=22°.(3)Under the premise of meeting the design requirements,the optimal slope section combination of the stepped engineering accumulation isα_(1)=47°,α_(2)=24.5°,d=0 m.The results can provide technical parameters and theoretical basis for reducing the amount of soil erosion in the accumulation of production and construction projects and comprehensively assessing the current situation of regional soil erosion.
作者
刘超
曹博召
王健
任艳
LIU Chao;CAO Bozhao;WANG Jian;REN Yan(Institute of Water and Soil Conservation,Northwest Agricultural and Forestry University,Yangling 712100,China;College of Resources and Environment,Northwest Agricultural and Forestry University,Yangling 712100,China)
出处
《自然灾害学报》
CSCD
北大核心
2022年第2期261-270,共10页
Journal of Natural Disasters
基金
国家自然科学基金项目(41771308)。
关键词
生产建设项目
土壤侵蚀
WEPP模型
坡型
工程堆积体
production and construction projects
soil erosion
WEPP model
slope type
engineering accumulations
