Study On Causation And Countermeasure Of Landscape Ecology In Qitai Oasis

This paper uses 3S technology, RS, GIS, GPS to complete the statistic of all sorts of Landscape Ecology, the change in different periods, the dynamic simulation of water table in interspace, the fieldwork in researching area and construction of field picture. Then decomposing the researching area into filler area, interlaced area and other area. Combining with polynomial fit to simulate the mathematics model of all sorts of Landscape Ecology in interlaced area and cropland in other two areas, then doping the acreage of all sorts of Landscape Ecology in interlaced area and cropland in other two areas in the next two years. By doping result and the changing matrix of acreage in different periods, we can draw the relationship between water table, the livestock number of Qitai county and all sorts of Landscape Ecology:(1) Changes of low grass acreages are the same as changes of water table in interlaced area, while affected by human being in filler area, low grass translates into cropland mostly. Although there are changes between low grass and middling or top grade grass, the acreages of change are very little. So the descendant reason of low grass this area is opening up wasteland of human being. Changes of low grass acreages are conversed to the changes of the livestock number of Qitai county in the other area, and low grass sharply changes into salina in this area. Middling or top grade grass degenerates to low grass mostly in each researching area.(2) Changes of middling grass acreages are conversed to changes of water table in interlaced area, while changes of middling grass acreages are conversed to changes of the livestock number of Qitai county in the other two area. With the decline of water table, the reason of increased middling grass is the descending of top grade grass. Because of opening up wasteland and pasturage of human being in the other two areas, many middling grade acreages grass not only change into cropland, but changing into low grass.(3) Changes of top grade grass acreages are the same as changes of water table in interlaced area, while changes of top grade grass acreages are conversed to changes of the livestock number of Qitai county in the other two areas. Top grade grass acreages decline to middling or low grass, and the top grade grass acreages are not only developed into cropland by human being in the other two areas, but also degenerated into middling or low grass.(4) Changes of hungriness acreages are the same as changes of water table in interlaced area, while changes of hungriness acreages are the same as changes of the livestock number of Qitai county...