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- W2370743705 abstract "The activities of mining produce great heavy metal pollution which threatens the surrounding ecosystem and human's health,the heavy metals can be transported to the surrounding soil,river and underground water.The heavy metal's stress to the biology can cause the variation of plants and community,which is called biogeochemistry effects.The excessive copper impedes the growth and development of vegetation,such as greenness decreasing,photosynthesis weakening,and the absorption capacity of other elements decreasing.The leaves of the vegetation lack water and get withered,so the spectral characteristics change with the influence of the stress.Dexing copper mine is an oversize multi-metal mine bed in our country.The development of mining has caused the pollution of mine environment,such as the ecologic problem in mine vegetation,land,water and the heavy pollution of solid waste and tailing water,particularly,the pollution of heavy metals such as copper.These problems have influenced the growth of vegetation greatly.This paper studies the heavy metal contamination and the biogeochemistry responses of vegetation Rhus chinensis Mill in Dexing copper mine area.The spectral characteristics of the responses are systematically extracted and analyzed with the principles and methods of remote sensing biogeochemistry.Acid,Cu,Cd are the main environmental pollution factors,the copper content in the soil is much more than the national environment standard and the pH value of the water in the lower reaches of the river is about three over the year.The plant Rhus chinensis Mill has enriched and translocated responses to copper,this plant is suitable for the environmental recovery which is one of the main vegetation and grows well in the area.From spectral processing such as derivative technology,continuum-removed spectra,red edge,vegetation index,we can get that the spectral position effects are notable to the influence of heavy metals.With the increasing of the influence of heavy metal stress: (1) the spectral reflectance of Rhus chinensis Mill increases obviously,about 5%—30%,(2) spectral shape blue-shift occurs,about 5—15nm,(3) the red edge slope increases,from 4.5534 to 8.9475,the variation is up to five,(4) the chlorophyll absorption depth decreases,the absorption center is near 680 nm and blue-shift,(5) the water absorption depth becomes lower and red-shift occurs about 10—20nm,(6) vegetation indices alter obviously,the ratio B_4/B_3 is from 18.763 to 13.1839,indicating the decrease of chlorophyll content in leaves,the WEI(water effect index) changes from 0.098014 to 0.226503,indicating the increase of intensity of water stress effect.Then some predominant characteristics are selected which are suitable for the evaluation of heavy metal pollution with the comprehensive analysis of spectral characteristics and the correlation between them and the contents of heavy metals." @default.
- W2370743705 created "2016-06-24" @default.
- W2370743705 creator A5052780381 @default.
- W2370743705 date "2008-01-01" @default.
- W2370743705 modified "2023-09-24" @default.
- W2370743705 title "Biogeochemistry Responses and Spectral Characteristics of Rhus Chinensis Mill under Heavy Metal Contamination Stress" @default.
- W2370743705 hasPublicationYear "2008" @default.
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