| With the social development and progress,human are more and more attention to economic,ignored ecological environment protection and construction,leading to the atmosphere,water pollution and other issues become increasingly prominent.Water nitrogen and Phosphorus main come from the release of sediment,runoff and atmospheric deposition,some scholars studies have shown that atmospheric pollutants with nitrogen and phosphorus settling under gravity or with the rain,snow,hail,water vapor,the settlement amount of nitrogen and phosphorus contributed to the water that can not be ignored.The topic chosen Dongpu site as a research object,during the2014.10~2015.9,in this experiment sampling duration is 24 h,retrieving water samples and ediately detecting TN,TP concentration,by the equation convert to the TN,TP deposition fluxes;recording 24 h hourly(water sample is placed on the roof)air quality factors concentration in Anhui air quality real-time forecasting system,recording 24 h hourly air temperature,air humidity,wind,rainfall in weather forecasting network,tryed analysising the TN,TP settlement deposition and air quality factors relations,initially got the concentration of atmospheric particles and TN,TP settlement relevant and laws,the results are as follows:1.During the period 2014.10~2015.9,nearby Dong Pu site areas TN,TP deposition fluxes were 3858.9 mg m-2,70.2 mg m-2 per year,atmospheric deposition based on nitrogen settlement.Based on projections,the experimental period of a year,the atmospheric deposition input DongPu reservoir TN,TP were respectively 800.7 t,14.6 t,entered ChaoHu TN,TP were respectively 2969.6 t,54.0 t,Chaohu Lake accounted for the total amount of nitrogen and phosphorus by 18%,2.5%.2.TN,TP settlement with precipitation increases,but settlement millimeters of precipitation,along with the rise and fall of precipitation.2.The non-precipitation day,wind had a certain impact on TN,TP influential settlement,under precipitation days had no influence on TN,TP settlement.3.Wind,rain days for atmospheric particulate matter,non-rain days affect deposition flux.1)In the non-precipitation days,indicating that non-precipitation,without considering other factors,under the breeze weather TN,TP settlement significantly lower than large wind weather,phosphorus deposition were more sensitive to wind.The days of precipitation,wind had no significant influence on TN,TP deposition millimeters of precipitation,indicating that precipitation day rainfall was the dominant factor,the wind was not large enough to cause significant changes in TN,TP settlement.2)Whether or not precipitation,atmospheric particulate matter concentration had significant impact on TN,TP settlement.Precipitation days per mm of precipitation TN,TP increase in atmospheric deposition fluxes with total total particulate matter concentration increases.4.PM2.5,PM10 concentrations influence on precipitation days for non-settlement day precipitation flux.1)Non-rainfall day,atmospheric PM2.5 particulate matter was not primary factor caused by nitrogen and phosphorus;in millimeters precipitation and TN,TP settling showed that the amount of PM2.5concentration increases with increasing regularity,there were significant differences between the two groups lower PM2.5 concentrations,and they were the significant differences between PM2.5 concentrations highest groups.2)In the non-precipitation days,PM10 concentration can affect the strength of nitrogen and phosphorus settlement,which was in stark contrast with the case of PM2.5.Precipitation days,millimeters precipitation accompanied by TN ? TP deposition amount increases with increasing concentration of PM10,indicating TN high concentration of PM10,TN?TP significantly greater than lower PM10 concentrations. |
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