南沙红树林湿地公园水环境质量时空差异分析——基于改进后倍斜率聚类分析的视角

宋焱, 徐颂军, 刘贤赵, 张勇, 邱鹏华, 牛安逸, 许观嫦

Time and Space Differences of Water Environmental Quality of the Mangrove Wetland Park in Nansha:Based on the Improved Twice-slope Clustering Method

Yan Song, Songjun Xu, Xianzhao Liu, Yong Zhang, Penghua Qiu, Anyi Niu, Guanchang Xu

表1 水环境质量标准(mg/L)

Table 1 The water environmental quality standard(mg/L)

项目 Ⅰ Ⅱ Ⅲ Ⅳ Ⅴ VI DO ≥7.5 6~7.5 5~6 3~5 2~3 0~2 COD BOD5 TP TN ≤15 ≤3 ≤0.02 ≤0.2 ≤15 ≤3 0.02~0.1 0.2~0.5 15~20 3~4 0.1~0.2 0.5~1 20~30 4~6 0.2~0.3 1~1.5 30~40 6~10 0.3~0.4 1.5~2 40~∞ 10~∞ 0.4~∞ 2~∞