江苏省沿海地区拟建水库库区土壤物质释放风险研究

Risk Analysis of Soil Release of Proposed Reservoir Sediment in Coastal Region of Jiangsu Province

为研究江苏省沿海地区建库后库区土壤释放引起的水库水质潜在富营养化与咸化风险,于2013年4月取#1、#2、#3、#4、#5、#6共6座规划水库库区土壤在室内进行物理模拟试验,从定量角度研究并分析不同地区土壤氮、磷及氯离子释放情况。结果表明,释放试验60d后,总氮超过Ⅲ类水质标准为#3水库,浓度为6.23mg/L;总磷超标的为#2、#5水库,浓度分别为0.13、0.06mg/L;氯离子超标的为#3、#5水库,浓度分别为252.00、420.00mg/L。分析可知,#2、#3、#5所在地区建库后土壤释放引起水库水质富营养化潜在风险高,#3、#5所在地区建库咸化潜在风险高。

In order to study the potential risk of eutrophication and salinization of the proposed reservoirs in coastal region of Jiangsu Province, soil samples of six proposed reservoirs named # 1, # 2, # 3, # 4, # 5, # 6 were taken to research on the release process by indoor physical simulation test in April, 2013. The results showed that TN, TP and C1 were the main factors that exceeded the quality standards of surface water after 60 days, the concentration of TN in e 3 was 6.23 mg/L, TPin #2 and 5 was 0.13 mg/L and 0.06 mg/L, CI in #3 and #5 was 252.00 mg/L and 420.00 mg/L. Based on the simulation test, it is concluded that there is a high risk of eutrophication in # 2, # 3, # 5 and salinization in # 3, # 5, when those proposed reservoirs were built and put into use.