A historical record serial of soil heavy metals (HMs) contents was constructed during 1950-2006 in Yixing City, an area with rapid socio-economic development in Changjiang (Yangtze) River Delta of China, by taking soils which covered in different years and have comparability as a carrier. Change of soil HMs pollution index was calculated, and then the impact of socio-economic development on soil HMs content and accumulation level was analyzed with gray correlative analysis model. Results showed that: (1) Temporal variaition in Cu, Ni, Pb, Zn contents and soil HMs accumulation level showed a shape of stretched "U", of which inflexion point is the late 1970s or the early 1980s. The content of As appeared declining, by contrast, there was a notable accumulation of Cd; Co and Cr contents showed comparatively stable oscillation. (2) Each socio-economic index has a high and stable grey correlation with soil HMs contents and accumulation level. Total population, usage amount of fertilizer and total cultivated area are the three most important impact factors of soil HMs contents, conversely, GDP, value of industry output in rural area and total freight volume have the weakest impact on soil HMs contents. Usage amount of fertilizer, total population and total grain yield make the greatest contribution to the soil HMs accumulation level.
XU Ming-xing, ZHOU Sheng-lu, WANG Xiao-rui, WU Shao-hua, CAO Wei, ZHANG Hong-fu
. Impact of Socioeconomic Development on Accumulation of Soil Heavy Metals in a Typical Region of the Changjiang River Delta[J]. SCIENTIA GEOGRAPHICA SINICA, 2010
, 30(6)
: 880
-885
.
DOI: 10.13249/j.cnki.sgs.2010.06.880
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