The Influence Of Human Activities On The Characters Of Wetland Natural Hydrologic Research

With the continuous improvement of human ability to transform nature,the impact of human activities on the natural wetlands to water increasingly increases. Therefore, this paper Bosten Lake wetlands as a major research area, the impact of human activities Bosten natural wetlands to water content of the research, Combined with 50 years of hydrological data Kaidu,yellow ditch and river water runoff and other major rivers as well as human factors data within the catchment, Applying relevant theories and methods of trend analysis to reveal the extent of the impact of human activities on the natural wetlands in the Bosten Lake to water, and the use of principal component analysis revealed the main driving factors Bosten natural wetlands to water.This study will help the ecological point of view on the whole Bosten Lake Basin, in-depth study of the influence of human activities, the development trend of wetland water resources and water environment evolution, wetland runoff process to clarify the mechanism of temporal and spatial patterns of ecosystem relationships, Explore the wetland water environment security and sustainable development measures, explore Bosten Lake wetland water resources under changing environmental component changes, as well as forecast future trends, and proposed coping strategies to promote the sustainable development of wetland water resources development, environment and sustainable development sustainable socio-economic development has important practical significance.This paper analyzes the three main natural Bosten Lake wetlands to open water resources are rivers, ditches and variation Yellow River water runoff and hydrology and human factors led to this change, Discusses the impact of agriculture, industry, domestic water, population and water conservancy investment-driven factors, and finally come to the following conclusions:1) By analyzing the Bosten Lake wetland runoff major rivers are open river runoff changes after a fall, rise, rise slowly, the rapid decline in the change process has four stages reply rising, as a whole showed an increase in slow;Yellow River water runoff ditch the last 40 years, small-scale fluctuations frequently inclined to increase the overall trend.2) Natural inflow into Lake Bosten in a slight increase in the overall trend, 1961-1963, 1967-1971, 1977-2000 in three stages is to continue on the stage; 1963-1967, 1971-1977 and 2000- 2008 is the rapid declinein runoff into the lake; the lowest net flows presents and 1977, 1.2 billion m3; the highest net flows in 2000 3.9 billion m3; This variation is mainly Bosten natural wetlands to open water are characteristic of the river changes are positively correlated, Kaidu increase runoff into the lake volume also increased; Kaidu reduce runoff into the lake volume less;3) Changing precipitation Bosten Lake Basin, which appeared in 1985,the minimum rainfall 59.2mm, 1998 appeared maximum precipitation214.3mm, precipitation overall upward trend has a positive effect on the increase in the Bosten Lake wetland nature to water;4) The use of principal component analysis method consisting of a matrix principle, the choice of the main factors affecting the general population, industrial water, agricultural water, domestic water and water conservancy investment, according to the formula after that: the impact of population growth Bosten natural wetlands to water main factors,agricultural water use is secondary, followed by industrial water and domestic water and water conservation investments;5) By building a multiple linear regression model of human factors influence runoff, the following conclusions:Y=2.45-0.94 X1-0.75X2-0.98 X3-0.46X4 +1.1X5(0.10)(0.08)(0.03)(0.04)(0.11)35.65)(56.98)(203.21)(305.78)(11.35)R12=0.96 R1-2=0.95 DW1=1.56 F=12.88Goodness of fit goodness of fit and correction equations are all above0.85, close to 1, indicating goodness of fit of the regression model for the observed data is particularly high, the model results and high reliability;highly significant regression equation; DW1 value = 1.56 for n = 16 k ’= 1DW For test value of the critical value d U = 1.37 d L = 1.10, DW1, DW2value> d U, d L value, indicating no autocorrelation;6) The method of least squares structure seen in the total population,industrial water, agricultural water, domestic water causes water runoff reduction, respectively 0.94,0.75,0.98,0.46 contribution. The water conservancy investment has a positive effect on increasing water runoff, the contribution of 1.1;...