开发建设项目水土流失特点及减蚀效益分析评价  

Soil and Water Loss in Development and Construction Projects and Cost-benefit Analysis for Reduction of Soil Erosion

作　　者：刘卉芳[1,2] 徐永年[1] 陈超 池春青 

机构地区：[1]中国水利水电科学研究院,北京100044 [2]北京沃尔德防灾绿化技术有限公司,北京100044

出　　处：《水土保持通报》2009年第3期170-173,共4页Bulletin of Soil and Water Conservation

摘　　要：通过对若干个大中型工程水土保持方案的编制工作,分析了点型工程和线型工程水土流失的主要特点。分析结果表明,不论点型工程还是线型工程施工期水土流失量都占到了总水土流失量的85%左右。点型工程水土流失量为86.61 t/hm2,线型工程水土流失量为202.40 t/hm2。点型工程施工期流失量与面积为线型关系,R2=0.9497。线型工程施工期流失量与面积为对数关系,R2=0.8003。实例分析表明,在计算减蚀量时应当慎重选取林草措施减蚀率的值。The characteristics of soil and water loss in block-type engineering and line-type engineering were analyzed by making soil and water conservation plan for some large and medium-sized projects. The analyses indicate that the quantity of soil and water loss in the construction period is 85 % of the total soil and water loss. The quantity of soil and water loss of per unit area in block-type engineering is 86.61 t/hm^2 and the quantity of soil and water loss per unit area in line-type engineering is 202.40 t/hm^2. The quantity of soil and water loss and the area in the construction period of block-type engineering have a linear relation （R^2=0. 949 7）. The relationship between soil and water loss and the area in the construction period of line-type engineering is logarithmic（R^2=0. 800 3）. Furthermore, some cases in the study show that it is need to calculate the reduced quantity of soil erosion by choosing the rate of reduced quantity of soil erosion for forestry and grass measures.

关 键 词：开发建设项目 水土保持方案 减蚀效益 

分 类 号：S157[农业科学—土壤学]