The Extration And Analysis Of Remote Sensing Biogeochemistry Effects Of Vegetation In De-Xing Copper Mine Area

In the paper, the environmental geochemistry features and the biogeochemistry effects of vegetation in DeXing copper mine area are studied, and the spectral and image characteristics of the effects are systematically extracted and analyzed with the principles and methods of remote sensing biogeochemistry. Acid, Cu, Cd are the main environmental pollution factors, the plant China Sumac has enrichment and translocation effects to copper, and morbid in heavy copper polluted area, it is suit for the recovery. From the process to spectral such as derivative technology, continuum removal process, red edge analysis, vegetation index extraction, we can get that the spectral characteristics of poison effects are notable with the influence of heavy metals. The spectral reflective indexes of China Sumac go up obviously, wave shape blue-shift, the red edge slope increases, the chlorophyll absorption depth is lower and blue-shift, the water absorption depth is lower and red-shift. Some ratio features and vegetation index, structure effect index, water effect index alter obviously. Then some predominant characteristics are selected which are suit for the evaluation of heavy metal pollution with the synthesis analysis of spectral characteristics and the correlation between them and the contents of heavy metals. From the statistics, principle analysis and ratio process, in addition to the analysis of spectral features and the compare of samples in different sites, some image characteristics are selected to extract the remote biogeochemistry effects. The image partition processes indicate that the vegetation index NDVI and ratio index ETM+4/ETM+3 are practicable and reliable to extract the growing information of vegetation. After compounding process and analysis to the multi-data with geography information system, we can get the vegetation growing situation and its distributed regularity in study area, then get the environmental geochemistry situation and the distribution of pollution, which support the recovery of mining environment.