Study On The Site Classification Of Typical Slope In Beijing

Beijing wastelands site types are complicated and scattered distribution, they mostly locate in ecological conservation belt and water reserves, and very easily cause geological hazards such as flash floods, mudslide, also aggravate the soil and water loss, groundwater pollution, soil pollution and other ecological problems. The exposed slope is one of typical wasteland site types, it's harm to environment is also more extensive. Researching exposed slope site factor characteristics and association rule that will help classifying site types. And the exposed slop site types will perfect the Beijing mining wasteland site type system, which is very helpful to vegetation restoration.The paper makes Beijing peripheral quarry, iron ore, coal mine, road slope as research objects, in the survey, multiple mathematics methods were used to evaluate the stableility and the site quality of the slope, and trying to find out the influence law among factors and establelish the site types classification system. Finally, the result shows that there are 12 site types and 32 micro site types.The result found out 12 site types by analyzing common factors, it includes low mountain low altitude peak rocky slope, low mountain low altitude hillside pile slope, low mountain low altitude hillside rocky slope, low mountain low altitude ravine rocky slope, low mountain medium altitude peak pile slope, low mountain medium altitude hillside pile slope, low mountain medium altitude hillside rocky slope, low mountain medium altitude ravine rocky slope, low mountain medium altitude ravine pile slope, low mountain high altitude peak rocky slope, low mountain high altitude hillside rocky slope, low mountain high altitude hillside pile slope.Rocky slope microsite types were also found based on 15 site types, there are stable rough neutral high steep slope, stable rough shadow steep slope, stable rough sunny steep slope, stable rough slightly smooth sunny steep slope, unstable rough sunny steep slope, unstable rough neutral steep slope, unstable less rough shadow steep slope, unstable less rough neutral steep slope, unstable less rough slightly smooth sunny steep slope, unstable less rough sunny steep slope, unstable rough sunny slope, unstable less rough slightly smooth shadow steep slope, unstable less rough slightly smooth sunny slope, unstable less rough slightly smooth shadow slope, unstable rough slightly smooth shadow steep slope.15 pile slope microsite types are stable gravel shadow steep slope, stablele gravel sunny steep slope, stable soil-rock shadow steep slope, stable soil-rock shadow steep slope, stable soil-rock neutral steep slope, stable soil-rock terrace sunny slope, stable stone sunny slope, unstable gravel terrace sunny steep slope, unstable soil-rock terrace sunny steep slope, unstable soil-rock sunny steep slope, unstable soil-rock neutral slope, unstable stone sunny steep slope, unstable gravel sunny steep slope, unstable gravel sunny slope, unstable stone shadow steep slope, unstable soil-rock terrace neutral steep slope, unstable soil-rock terrace sunny steep slope.