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.