Comprehensive analysis of natural eco-environment of Yellow River valley

Natural eco-environment of Yellow River valley is a rather complicated complex. It is a problem worthy of study on how to carry out comprehensive quantitative analysis. This article comprehensively chooses nine natural environment indexes, including vegetation index, land utilization ratio, soil erosion intensity, accumulated temperature over o, accumulated temperature over 10, annual average temperature, precipitation, elevation and slope, and establishes preliminarily natural eco-environment comprehensive analysis index system of Yellow River valley. Among them, the data of vegetation index, land utilization degree and soil erosion intensity are received by remote sensing survey, and those of accumulated temperature over o, accumulated temperature over 10, annual average temperature and precipitation are spatial Kriging in terms of the concrete measured materials of the weather station, and those of elevation and slope are got by the DEM data. Through adopting Spatial Principal Component Analysis Comprehensive Evaluation, it may conduct comprehensive evaluation classification and the results are in the middle of seven levels classified, among which the third level is the largest in the whole region area, 31.5%, and the second level followed