Study On Geological Environment And Land-Use In Hohhot

The relationship between geo-environmental and land-use types datas in 2005 year were studied in the paper, impact of geo-environmental on land-use system was esTablelished.The main results were: (1)In the study area, land use types'area in descending order was grassland, cultivated land, forest land, construction land, water and unused land. (2) Relationship between landform and land use types, grasslands were mainly distributed in mid-elevation and mid-elevation loess hilly areas. Forest was mainly distributed in mid-elevation hills and middle-high elevation Relief Mountains. Arable land was mainly distributed in various types of plains. Construction land was mainly distributed in middle-high elevation Relief Mountains, mid-elevation erosion plain. Water was distributed in all major landscape types. Unused land was mainly distributed in mid-elevation alluvial plain. (3) The relationship between slopes and land use types, cultivated land was widely distributed in the 0°～5°of slope segment area, and reduced constantly along of the increase proportion of slope. Grassland and woodland in the slope were in the different direction of diversification, between 5°to 15°segment, grassland was main land type, with the increase in slope, the proportion of grassland was reduced gradually, while the proportion of forest land was increased constantly, and the 15°～20°slope section was the dividing line between such variations, then woodland was became main land type. The proportion of construction land and waters were reduced gradually as the slope increases. Unused land was at the maximum in the 0°～5°segment, and in the other slope segments had not clear distribution laws in slope. (4) The relationship between land use types and the lithology, loose rock was played a very important role in the region's social and economic development. metamorphic rocks were taken as base of loose rocks, cultivated land was the main land type, and it was the major distribution area for construction land; In the bedrock, in these regions, elevations were higher and slope were changed greatly, the distribution of the largest was grassland, and forest land was spread in the mountainous and hilly areas widely, which may be mainly due to the higher elevation mountains and hilly areas, slope changed greatly, due to natural conditions of precipitation in the Hohhot area of more high altitude, and slope direction in the evaporation of water causes little more sunny. (5)Impact of geo-environmental on land use evaluation of Hohhot results showed, it concludes that the regional distributions of first class areas were in the Daqing Mountain Piedmont area of Hohhot, Tumote left county and Tuoketuo County areas. Second class areas were mainly distributed in the southern edge of the region, eastern region, Wuchuan basin and its northern areas; Third class areas were mainly distributed in the mountainous regions, hilly areas, the edge of the better-quality regions, rarely in the loess areas; Fourth class and fifth class areas were mainly distributed in Helingeer County, Qingshui river County, southern of Tuoketuo County, as well as central region of the mid-elevation hills.