宁夏艾依河水体富营养化生物防治技术研究与实践

Research and Practice on Biological Control Technology for Eutrophication of Ningxia Aiyi River

近年来宁夏艾依河出现了水质富营养化。为了评价艾依河富营养化程度并进行防治,建立水质监测断面,开展了艾依河水质监测、调查评价研究。引进水生植物群落的物种配置技术和空间配置技术,水生植物的布局和造景技术,围隔技术,生物浮岛技术,水生生物的管理技术,集成水体富营养化生物防治技术模式3种,结合景观营造,建设示范区3个。经过三年的示范应用,示范区水体浊度从34.5NTU降低到9.4 NTU,透明度从30 cm提高到80 cm,总磷降低51.8%、总氮降低39.8%、氨态氮降低60.2%,取得了良好的水质净化与景观效果。

In recent years ,eutrophication phenomenon appeared in Ningxia Aiyi River .In order to evaluate the degree of eutrophication of Ningxia Aiyi River and take responding control measures ,monitoring sections were established to monitor ,investigate and evaluate the water quality .Species and space configuration of aquatic plant communities ,layout and landscaping of aquatic plants ,enclosure construction ,biological floating islands and management of aquatic organisms were introduced ,based on which three kinds of biological control measures for eutrophication were integrated .Three demonstration zones were established combining with the landscape construction .After three years ,the water turbidity of demonstration area was reduced from 34 .5NTU to 9 .4NTU ,the transparency was increased from 30 cm to 80 cm ,total phosphorus was decreased by 51 .8% ,total nitrogen was decreased by 39 .8% ,and ammonia nitrogen was decreased by 60 .2% .This proved that the control measures achieved good results in water purification and landscape beautification .