摘要
为了通过漓江底栖无脊椎动物状况建立适合漓江的生物完整性指数,进而评价漓江流域内水质健康状况,于2008年3月调查了漓江水系17个参照点和14个监测点的水化学与底栖无脊椎动物指标,水质化学指标检测结果显示,参照点的TP、TN、NH3-N和COD浓度一般低于监测点。通过对46个候选生物参数的计算和逐步分析,确定了构成底栖动物完整性B-IBI指数的4个生物参数:总分类单元数、EPT分类单元数、扁蜉占蜉蝣总数的百分比和优势单元数量百分比,初步确立了B-IBI健康评价标准,即B-IBI≥21为健康;B-IBI<21为不健康。评价结果表明:漓江上游及各支流健康状况较好,大部分为健康;中下游干流健康状况较差,大多为不健康。
In order to develop a benthos index of biotic integrity （B-IBI） for benthic invertebrate and assess the water quality health of the Lijiang River basin, benthic invertebrate communities and hydrochemical variables were investigated in March 2008 at 31 sites, of which 17 were reference sites and 14 were monitoring sites. TP, TN, NH4＋ -N and CODM. were lower at reference sites than at monitoring sites. Forty-six candidate biological parameters were selected and calculated from the data of all sites and sequentially analyzed to develop the B-IBI. The B-IBI was composed of four biological parameters： total taxa, EPT taxa, pecentape of Heptageniidae in Epbemeroptera, and percentage of dominant taxa. It was suggested that the water quality in Lijiang River basin was healthy for B-IBI≥21, and unhealthy for B-IBI 〈 21. The assessment results using B-IBI showed that most of the branches in the middle and upper reaches of the Lijiang River were healthy, and the lower reaches of the Lijiang River were unhealthy.
出处
《水资源保护》
CAS
2010年第2期13-17,23,共6页
Water Resources Protection
基金
国家自然科学基金(40371047
30871045)
广西科技厅攻关项目(0632006-3A)
