[Environmental characteristics of the atrazine in the waters in East Liaohe River Basin].
Based on the field investigation and the Laboratory experiment, and taking the Geographic Information System (GIS) techniques as the key data disposal platform, the spatial and temporal differences and the enrichment characteristics of atrazine in the surface water in East Liaohe River Basin were systematically analyzed, the effect factors on that also were interpreted. The results show that, the average atrazine content in waters in regions with glebe or without glebe were namely 9.71 microg x L(-1) and 8.854 microg x L(-1), and the lower reach of the trunk was formed as the focus filed of the atrazine in waters. July is the month that the water contained the largest atrazine with the maximum content of 18.93 microg x L(-1). The spatial pattern of the atrazine in the waters clearly shows that, the atrazine used in the glebe are endangering the surface waters quality in the whole basin and will worsen the waters environment of East Liaohe River basin. The normalized enrichment index of the atrazine in the surface water related to plant atrazine is 0.605-1.750 with the spatial difference, the right part of the trunk is the continuous region with high index, the left part of the trunk is on the contrary, and the lower reaches is the focus region with high index. The normalized enrichment index of the atrazine in the surface waters related to soil atrazine has the spatial difference same to the index related to soil, however, the region with large index or little index has the scattering features. With respect to the effect of soil on the atrazine in the water, the integrated token index of the low moor peat soil is the largest and the peat moor soil and the paddy soil are the least. With respect to effect of the landscape pattern on the atrazine in the surface waters, the integrated token index will increase with the interaction between patches. With a certain range, the integrated token index will increase with the precipitation and runoff; however, the integrated token index will decrease with precipitation if the precipitation excesses the range.
Yan
Deng-hua
DH
Water Department, China Institute of Water Resource and Hydropower Research, Beijing 100044, China. denghuay@126.com
He
Yan
Y
Wang
Hao
H
D001280:Atrazine / Q000032:analysis*; D002681:China; D005618:Fresh Water / Q000032:analysis*; D040362:Geographic Information Systems; D006540:Herbicides / Q000032:analysis*; D011891:Rain; D045483:Rivers; D014874:Water Pollutants, Chemical / Q000032:analysis*
D006540:Herbicides; D014874:Water Pollutants, Chemical; D001280:Atrazine