基于综合营养状态指数和BP神经网络的黑河富营养化评价  

Eutrophication Evaluation of Heihe River Based on Comprehensive Trophic State Index Method and BP Neural Network

作　　者：鲍广强 尹亮[1] 余金龙 刘畅[2] 邱小琮[3] 

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川750021 [2]中国水利水电科学研究院水环境研究所,北京100038 [3]宁夏大学生命科学学院,宁夏银川750021

出　　处：《水土保持通报》2018年第1期264-269,共6页Bulletin of Soil and Water Conservation

基　　金：国家水体污染控制与治理科技重大专项"重点流域水生态功能三级四级分区"(2012ZX07501-002-05)

摘　　要：[目的]探究黑河流域富营养状态,为黑河流域水体污染综合防治提供基础数据和理论依据。[方法]选取叶绿素a(Chl.a)、总氮(TN)、总磷(TP)、高锰酸盐指数(COD_(Mn_))、透明度(SD)作为评价因子,使用综合营养状态指数法和BP神经网络对黑河流域的富营养化进行综合评价。[结果]黑河富营养化状况主要以中营养级为主,其中野牛沟和张掖湿地的营养指数接近轻度富营养程度,东居延海处于重度富营养化,尤其是总氮指数很高,应该及时进行治理和保护。[结论]相对于综合营养状态指数法,BP神经网络对黑河流域的评价结果更加贴近实际结果,较为客观可靠。[Objective] To evaluate the current eutrophication state and provide basic data and theoretical support for the pollution control in Heihe River basin.[Methods] The total nitrogen （TN）, total phosphorus （TP）, permanganate index （CODMn）, chlorophyll a （Chl.a）, transparency （SD） were selected as indexes for water quality evaluation, and the comprehensive trophic state index and BP neural network were used to evaluate the eutrophication of Heihe River basin.[Results] The eutrophication status of Heihe River basin was mainly in medium level of nutrition. The nutrition status index of Yeniugou and Zhangye wetland were close to mild eutrophication. The eutrophication status of East Juyanhai Lake was severe and the total nitrogen index was high. The water environment of East Juyanhai Lake should be protected in time.[Conclusion] Compared to the comprehensive trophic state index method, the evaluation results of BP neural network are closer to the actual situation, and more objective and reliable.

关 键 词：黑河流域 综合营养状态指数法 BP神经网络 富营养化评价 

分 类 号：X824[环境科学与工程—环境工程] TP183[自动化与计算机技术—控制理论与控制工程]