The Use Of Characteristics Of The Volume Method In The Alongside The River Type Reservoirs "Three Nitrogen" Migration Model

Riverside water resource field is one of the water resources of human existence. It is the most common form exploitation of water resources in the north, which has the characteristics of the river supplies, but with the rapid development of society, the damage to the environment has caused the pollution to the river and it has intensified the deterioration of the groundwater quality.This article selects liaohe around as the study area, groundwater flow field model is established, and the finite volume method is adopted to solve the model, but because the model is a nonlinear equation, the calculation is complicated, so it needs to be discreted the model before the linearizing processing, linear system of equations of discrete get forecast correction in order to get the actual measurement data which fits the better numerical results.Secondly, on the basis of the flow field model "Three nitrogen" migration transformation model was set up and by the discrete solution, getting the "three nitrogen" distribution, calculation results show that the change of groundwater quality in the study area is generally bad, the study area of ammonia nitrogen pollution mainly comes from the Hun River’s supplies; Ammonium nitrate nitrogen pollution derived from fecal sewage, soil, ammonia fat three parts, the proportion of the earth’s surface pollution, pollution mainly comes from outside of the groundwater flow.