Study On The Ecological Characteristics Of Slope Vegetative Treatment In The Three-Gorge Reservoir Area

The Three Gorge project is the most distinguished one all over the world. As the completion of main body, ecological security and living of the native people is the key factor to its successful and effective function. So it is very urgent to strengthen the conservation of soil and water, which is very significant to enhance and consolidate the conservation of soil and water of the Three Gorge reservoir area and upper Reaches of the Yangtze River and ecological construction, and also helpful to carry out the strategy of West Development, eradicate flood disaster of the Yangtze and the insure the long-term safety of the Three Gorge project function and whole Basin to implement the sustainable development of society and economic. The plots are located in the First county of thePrimary Three Gorges Reservoir area------BaJiaoXi watershed, ZiGui county, HuBeiprovince. Five patterns including Bamboo stand , Chestnut intercropping stand, Tea garden, Orange garden and chestnut stand restoration from cultivation are the studied object. Based on the data of orientation monitor of field and sample, experiment analysis and mathematics Analysis and evaluation of last two years, the paper studied comparably the characteristic about soil and water losses in several vegetative harness modes of soil erosion and theirs effect to physics parameters interrelated consanguineously with water of soil. In order to explore the character of soil and water losses along with the character of the soil in several harness models .This will offer the basis for experimentation and support for technology for the .The results are as follows:(1) The precipitation in flood season during May to Sep accounts for seventy percent of the total annual precipitation. The maximum of precipitation appears at July, and accounts twenty percent of the total annual precipitation. The minimum appears at Jan, and only accounts two percent the total annual precipitation. There are certain relationships between precipitation and precipitation times, but their relationship is not completely direct proportion. The rules of distribution of precipitation type among months are listed below: During May to Sep, every kind of rain is proportion of that of the year: Small rain, 55%; moderate rain,70%; big rain, 85%;heavy rain, 100%.There is positive relevance between precipitation and runoff among all harness modes during experiment, and as the increase of precipitation, the runoff increase greatly. Except of logarithmic relation in chestnut stand...