Research About The Water Level Change's Effect On The Deseratation Of Everglade Around Ebinur Lake

This paper analysed the temporal and spatial changing feature about the lake and hungriness areas and then investigated the intrinsic link between the two by making use of the remote sensing image received during recent three years and some documents recorded by others in past 50 years. Based on the achievement above-mentioned,the paper predicted the changing trend of lake and hungriness areas . The major findings of this paper are as followings:(1)The shrinking of lake will made the desertifications increased.The continuous shrinking of lake not only caused the lake-bed exposed in wide area but also transformed the evoving direction of vegetation. Under the multiplex effect of vegetation,lake-bed and gale,the degree of erosion and desertification area are bound to show an upward trend.(2)The expanding of lake is one of the main factors which will make the salinization more serious.If the area of lake expanded, the original area of the dried lake-bed will be inundated.Furtherly, the desertification area will be reduced and the ecological environment will be improved to some extent . However, the expansion of water will cause the salinity increased. Once the water level dropped,the kaline soil will be bared and began to be eroded.(3)The lowest level of water which can prevent the desertification:According to the observational synthesis in Ebinur Lake, the happening of sand storm is of abvious regularity:the amount of dust weather from march to June accounted for 62% of all the dust days every year. Therefore, the most important task to prevent wind erosion is to conctrol the area of naked lake-bed during march to June. the paper believed that maintaining the lake area of 800 km~2 or so can effectively control the occurrence of dust weather in the spring .(4)In next dozens of years, the consumption of water will continue to increase if we do not take some measures to guarantee the stability of the water level, the Lake will be faced with the fate of contraction once again. but the harm caused by sand storms will not return to the level of the 1980s.