澧县王家厂水库生态因子的灰关联分析

采用灰色系统关联度分析方法,以空间理论数学为基础,依规范性、偶对称性、整体性和接近性原则,计算并分析了在人工控制条件下澧县王家厂水库13个生态因子(透明度、水深、水温、溶解氧、酸碱度、电导率、氨氮、硝酸盐氮、总磷、总氮、氮磷比、浮游动物和浮游植物)的关联度,南河关联序结果为:氮磷比>总氮>硝酸氮>氨氮>浮游植物>浮游动物>溶解氧>酸碱度>总磷>水温>电导率>透明度>水深;北河:氮磷比>总氮>总磷>硝酸氮>浮游动物>水温>水深>酸碱度>溶氧>透明度>浮游植物>电导率>氨氮。分析表明,氮磷比、总氮和总磷是水库水体的优势影响因子。在研究过程中发现,除个别样点超出Ⅲ类水标准外,其余均在Ⅲ类范围内;说明王家厂水库在放养鱼类的情况下,通过合理的人工能量投入,可以达到既增加水体生物的多样性,又提高水体生产力,实现水生态保护的目的。

Grey Relational Analysis for Ecological Factors of Wangjiachang Reservoir Located in Lixian City, Hunan Province

Based on the mathematics of space theory, according to the normalization, symplectic symmetry, integrity and accessibility, we calculated and analyzed the relevancy of 13 ecological factors of Wangjiachang Reservior through the grey relational analysis under the condition of manual control, including water transparency, water depth (WD), water temperature (WT), dissolved oxygen (DO), pH, conductivity, ammonia nitrogen (NH4+-N), nitrate nitrogen (NO3--N), total phosphorus (TP), total nitrogen(TN), ratio of TN to TP (TN/TP), zooplankton and phytoplankton. The results showed that to the South River, the relational order from high to low was that TN/TP, TN, NO3--N, NH4+-N, zooplankton, phytoplankton, DO, pH, TP, WT, conductivity, transparency, WD; meanwhile, to the North River, the order was that TN/TP, TN, TP, NO3--N, zooplankton, WT, WD, pH, DO, transparency, phytoplankton, conductivity, NH4+-N. In this study, we can get some information, that the ratio of TN to TP, TN and TP are the dominant in all the factors of reservoir, and the conductivity and water transparency have less influence.