Horizontal loss rate model for substance content in marine bay

Understanding the transferring process of substance content is meanful for pollution control in marine bay. In order to reveal the unit-distance loss rate of substance contents in marine bay during the transferring process, this paper provided a horizontal loss rate model. Based on this model, we found the laws of horizontal loss rate of substance that, for a certain substance and in a same water body, if the relative unit-distance loss rate was stable and constant, the relative horizontal loss rate for a certain substance and in a same water body would be same and closed. Furthermore, we provided an example to show the performance of this model based on investigation data on Cr in May 1979 in Jiaozhou Bay, China. Results showed that from costal waters in the north to the center of the bay, Cr content lossed 13.92 mu g L-1 for each 1 km, while from the costal waters in the middle to the bay mouth in the south of the bay, Cr content lossed 2.80 mu g L-1 for each 1 km. In generally, this model example was confirming the laws of horizontal loss rate of substance.