生态保护视角下的青海省土地复垦分区研究

Study on the land reclamation in Qinghai province from perspective of ecological protection

青海省面积辽阔,地形地貌复杂多变,生态环境原始脆弱,对青海省的土地复垦进行科学分区,对于复垦工作的实施与管理具有重要意义。本文选取青海省地形、降水量、温度、土壤、植被分布和土地利用现状作为分区指标,以县级行政单位为最小分区单元,通过变异系数法确定指标权重,采用权重指数和法计算最小分区单元的复垦条件综合分值,最后通过空间聚类和定性分析途径,将青海省划分为柴达木盆地寒温干旱荒漠、草甸复垦区、青南高原高寒湿润草甸复垦区、中部山地寒温半湿润草甸复垦区、东部温暖半干旱农业复垦区、祁连山东段寒温半湿润草甸复垦区五大复垦区,并针对各个复垦区实际情况提出了针对性的保护与复垦对策。

Qinghai province has a vast area,complex and changeable topography and fragile ecological environment.Scientific division of land reclamation in Qinghai province is of great significance to the implementation and management of reclamation work.Selecting the topography,precipitation,temperature,soil,vegetation distribution and land use status of Qinghai province as the indicators,the county administrative units as the smallest zoning unit,through the coefficient of variation method to determine the index weight and calculating the sum of weight index,and comprehensive points of the smallest partition unit were calculated.Through the method of spatial clustering and qualitative analysis,Qinghai province is divided into cold and arid desert in Qaidam basin,reclamation area of meadow,alpine wetland reclamation area in Qingnan plateau,warm and semi-humid meadow reclamation area,warm and semi-arid agricultural reclamation area in the east and cold and wet semi-humid reclamation areas in the eastern Qilian mountains.According to the actual situation of each reclamation area,some countermeasures for protection and remediation are put forward.