洱海流域蔬菜种植业污染特征浅析

Pollution Characteristics of Vegetable Planting in the Erhai Lake Basin

选择洱海流域典型蔬菜种植区,分别对蔬菜种植区雨季地表径流和地下水进行监测分析,依据水量平衡原理估算蔬菜种植区雨季地表径流排水量及地下淋溶水量,计算得出流域蔬菜种植产生污染物流失量为CODCr118.90kg/hm^2、TN165.59kg/hm^2、TP3.07kg/hm^2,污染物通过雨季地表径流排水产生的污染物流失量分别占总流失量的85.02%、81.62%、86.97%;分析得出蔬菜种植业污染主要为TN污染。

The surface runoff and groundwater of vegetable planting areas in rainy season were monitored and analyzed in the Erhai Lake basin. The amounts of surface runoff drainage and underground leaching water were estimated based on the principle of water balance. The pollutants produced from vegetable planting were calculated as 118.90kg/ hm^ 2 of COD Cr , 165.59kg/ hm ^2 of TN, 3.07kg/ hm^ 2 of TP. This pollution load generated through the surface runoff drainage in the rainy season accounted for 85.02%, 81.62% and 86.97% of the total pollution load of three above pollutants, respectively. It was indicated that the impact of vegetable planting on Erhai Lake was mostly from TN.