柴河水库流域主要种植类型非点源污染试验研究

为研究水稻田、玉米地和苗木地三种重要耕作类型的非点源污染产生规律,分别选取了柴河水库流域内地理位置相近、土壤特性相似的三块试验田进行了非点源污染类型源试验,分析了不同试验田的产污特征及其影响因素。结果表明,在相同降雨条件下三种耕作类型试验田的污染物输出特征各不相同;相同试验田在不同降雨条件下的产污规律也会发生相应变化;耕作类型、降雨特征和施肥状况都是影响农田非点源污染的重要因子。

Experimental Study on Non-point Source Pollution of Main Farmlands in the Chaihe Reservoir Watershed

In order to investigate the characteristics of non-point source pollution from three kinds of farmlands, including rice field, corn field, and seedlings field, a series of rainfall-runoff experiments were conducted in the three experimental fields of the Chaihe Reservoir Watershed with close location and similar soil type. The yield characteristics and impact factors of non-point source pollution from these fields were analyzed using the rainfall and runoff data from the monitoring rainfall events. The results showed that the event mean concentrations (EMCs) of different land use fields vary under the same rainfall conditions, and the EMCs of the same land use field can also be quite different under different rainfall conditions. Land use type, precipitation characteristics, and fertilizer application play important roles in affecting the non-point source pollution.