Evaluation of ecological restoration technology model of Gangue Mountain in Ningdong Coal Base
For the northwest arid coal mining area ecological environment problem identification is not clear,ecological restoration technology model is not targeted,a single measure and other issues,this study to Ningdong coal base six Gangue Mountain and the surrounding natural land for the object of study,the use of principal component analysis method for the division of the stand type,the use of composite fuzzy object entropy weight method from the effect of soil improvement,the effect of vegetation restoration and the status of the technical measures(technical measures integrity and using the composite fuzzy entropy weight method,we constructed an evaluation system with 19 indicators in 3 aspects,determined the weights of each indicator and comprehensive evaluation,and screened the ecological restoration technology models of different land types,aiming to provide technical support for the gangue mountain in the Northwest Arid Zone.The results show that:(1)Slope direction,slope gradient and soil thickness are the dominant factors in the classification of land types,according to which the gangue mountain is classified into four land type groups:yin slope,yang slope,semi-yin and semi-yang slope and platform land type groups,and nine types of land types:thick sharp yin slope,middle sloping yin slope,thick sloping yin slope,thin sharp yang slope,middle sloping yang slope,thick sloping yang slope,middle sloping semi-yin and semi-yang slope,thick sloping semi-yin and semi-yang slope,thin sharp semi-yin and semi-yang slope and thick layer.Platform elevation type;(2)for the land type of middle-layer sloping semi-yin and semi-positive slope,the recommended mode is"gravel sand barriers"or"living sand barriers";the mode of thick-layer rapid sand barriers is"sand barriers";and the mode of thick-layer rapid sand barriers is"sand barriers";and the mode of thick-layer rapid sand barriers is"sand barriers"."mode;thick layer acute yin slope,thin layer acute yang slope land type,recommended"sowing grass seed+gangue wall+environmental protection resin network engineering slope protection+drainage ditch+micro-spraying"mode;middle layer sloping yin slope,middle layer slope land type,recommended"sowing grass seed+gangue wall+drainage ditch+grass square"mode;middle layer sloping yin slope,middle layer slope land type,recommended"sowing grass seed+gangue wall+drainage ditch+grass square"mode.Drainage ditch+grass square lattice"mode;thick layer platform land type,recommended"seedling planting+grass square lattice+intercepting water ditch"mode.
万方数据
维普
