摘要
河流健康评估单元划分是开展河流健康评估和生态系统保护的重要基础,可以揭示河流生态系统健康状况的空间特征差异。构建了河流健康评估单元的划分标准和方法,并以抚河为研究对象,通过水环境监测点样本聚类分析和相关性分析,甄别划分河流健康评估单元的关键指标,合理确定河流健康评估单元的划分标准,科学划分抚河健康评估单元。研究结果显示:①抚河水环境监测初始布局共布设40个监测点,分为7类,优化后的监测点数量减少为16个;②各水环境监测指标中,叶绿素a与监测点分类结果之间的相关系数为0.944,并在0.01水平上显著相关,由此确定叶绿素a为抚河健康评估单元划分的关键指标;③以叶绿素a的浓度(mg/m^(3))为分区指标,确定抚河健康评估单元的分区标准为(0,5)、[5,8)、[8,11)、[11,14)、[14,18)、[18,24)、[24,+∞);④抚河共分为16个健康评估单元,每个评估单元包含至少1个监测点,其中,相水源头区和相水干流两个相邻健康评估单元所包含的水环境监测点属于同一分类,其他相邻分区所含监测点均属于不同分类,表明所构建的河流健康评估单元划分方法具有一定的合理性和适用性。
The division of river health assessment unit is an important basis for river health assessment and ecosystem protection,which can reveal the difference of river ecosystem health spatial characteristics.In this paper,the criteria and methods for division of river health assessment units were scientifically constructed.Taking Fuhe River as the object,combined with water environment monitoring data as the basis,the key indicators of river health assessment unit were identified through sample clustering and correlation analysis,the criteria for division of river health assessment units were reasonably determined,and the river health assessment units of Fuhe River were scientifically divided.The results showed that:①40 water environmental monitoring points in the initial layout of Fuhe River were divided into seven categories,and the optimized monitoring points were reduced to 16 monitoring points;②The correlation coefficient between chlorophyll a and classification was 0.944,and significantly correlated at the level of 0.01,so chlorophyll a was identified as the division index of river health assessment unit in Fuhe River;③Based on the division index of chlorophyll a concentration(mg/m^(3)),the division criteria for the seven categories in Fuhe River were(0,5),[5,8),[8,11),[11,14),[14,18),[18,24),[24,+∞),respectively;④Fuhe River was divided into 16 river health assessment units,each of which includes at least one monitoring point,and the assessment units for the division of the headwaters and the main streams of the Xiang River were still the same.In the other two adjacent units,they belonged to different classifications,which indicated the rationality and applicability of the division method of river health assessment unit.
作者
刘聚涛
温春云
胡芳
楼倩
杨平
戴国飞
王法磊
LIU Jutao;WEN Chunyun;HU Fang;LOU Qian;YANG Ping;DAI Guofei;WANG Falei(Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake,Jiangxi Provincial Institute of Water Sciences,Nanchang 330029,China)
出处
《中国环境监测》
CAS
CSCD
北大核心
2021年第1期129-135,共7页
Environmental Monitoring in China
基金
国家重点研发计划(2018YFC0407600,YS2017YFGH00106501)
江西省自然科学基金面上项目(20192BAB206049)
国家自然科学基金地区科学基金项目(31660138)
江西省水利科技计划项目(KT201701,KT201605,201922ZDKT16,201820YBKT09)。
关键词
评估单元
划分方法
河流健康
水环境监测
抚河
assessment unit
division method
river health
water environment monitoring
Fuhe River
