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通过对加拿大大湖流域每年收集农耕地地表水进行水质分析研究，用文件证明和每年悬移质泥沙沉积体积来统计每年磷和悬移质泥沙含量的比率对应单位面积悬移质泥沙含量。得出回归方程式：ｙ＝１８．８３ｘ－０·３２９，其复相关系数ｒ２为０．６２。该方程式表明了磷和悬移质泥沙含量的比率与单位面积悬移质泥沙含量之间具有一定的密切关系，它与流域大小无关。资料数据点与回归线间适应性差异，可能由于流域生产力或泥沙含量及不同研究方法影响的结果。该方程能在已知泥沙含量的情况下有效地预测磷的含量。从农耕地上产生的径流对地表水来说是一个丰富的养分和污染来源，也是农业污染的关键所在。这个问题在安大略西南部已被许多研究资料所证明，但是都没能得到有效地控制和很好地解释。
Through the water quality analysis of surface water collected from farmlands in the Great Lakes Basin in Canada every year, the annual sediment concentration of suspended sediments and the volume of suspended sediments are used to calculate the annual phosphorus and suspended sediment sediment content ratio corresponding to suspended sediment content per unit area . The regression equation is obtained: y = 18.83 × -0.329, and the complex correlation coefficient r2 is 0.62. The equation shows that there is a certain close relationship between the ratio of phosphorus and suspended sediment content and suspended sediment content per unit area, which has nothing to do with the basin size. Differences in adaptability between data points and regression lines may be the result of basin productivity or sediment content and the impact of different research methods. This equation can effectively predict phosphorus content with known sediment content. Runoff from agricultural land is an abundant nutrient and source of pollution for surface water and is also the key to agricultural pollution. This problem, which has been proven in many studies in southwestern Ontario, has not been effectively controlled and well explained.