Study on Nitrogen and Phosphorus Environmental Capacity of Zhelin Bay

A POM08 model with a wetting and drying scheme was used to simulate the two-dimensional and vertical-averaged tide and tidal current of Zhelin Bay. Meanwhile, a two-dimensional material transport equation was coupled with the model to calculate the nitrogen and phosphorus environmental capacity of five pollution sources of Zhelin Bay by using the sharing rate method. The hydrodynamic computed results agreed well with the observed ones. The environmental capacity results showed that, the nitrogen flux to the sea of the Huanggang River and the drain outlet of Datang power plant should deserve focused attention in the nitrogen control and the phosphorus flux to the sea of the Huanggang River should deserve focused attention in the phosphorus control. The seriously polluted sea area by the inorganic nitrogen of Zhelin Bay was the north-south direction of the inner bay and the outer bay divided by Xunzhou Island and Xi'ao Island while the seriously polluted sea area by the active phosphrous of Zhelin Bay was the inner bay of the north direction of the three paratactic islands.