| Luanhe Tianjin water diversion project is China’s first large-scale inter basin water transfer project. In this paper, through the determination of Luanhe Tianjin Water Diversion Project in Daheiting reservoir and Yuqiao reservoir sediment concentration in the surface waters of nitrogen, phosphorus speciation and distribution characteristics of nitrogen, phosphorus forms in surface sediments in Yuqiao Reservoir,According to the load caused by the mode of production and life along the path of nitrogen, phosphorus pollution contribution,Combined deliver period and non- deliver water we discussion of the Luan River upstream scheduling under Daheiting fishery breeding on the downstream of Yuqiao reservoir at nitrogen and phosphorus pollution load.Obtaines following conclusions:(1)The entire study area water is alkalescent water, mean of p H is 8.46.In deliver water period time, Concentration of TP、DTP、DIP、TN、NH4+-N、NO3--N、NO2--N of deliver water area is 0.27mg/L、0.17 mg/L、0.11 mg/L、4.84 mg/L、0.52 mg/L、3.38 mg/L、0.12 mg/L, respectively. And in non- deliver water time, except Lihe river is discontinuous, concentration of nitrogen and phosphorus forms is0.29 mg/L、0.17 mg/L、0.12 mg/L、6.44 mg/L、0.25 mg/L、4.98 mg/L、0.36 mg/L. Pollution in Shahe river was rather serious, because it was receiving many tributaries and the territory of Zunhua county industrial wastewater and the life waste water. Concentration of nitrogen and phosphorus forms is like Daheiting reservoir >Guohe River > Li River > Yuqiao Reservoir. Upstream water quality has direct effect on the water quality of Yuqiao Reservoir.(2) Surface sediments of Yuqiao Reservoir shows a weak alkaline,mean of p H is 8.34. Affected by the reservoir surrounding the production and living conditions of concentration of OM、TP、TN was skewnessed, mean of OM is 4.18%, surface sediments of Yuqiao reservoir has organic pollutioned. mean of OM was non- deliver> deliver period. The mean content of TP in surface sediments is 534.26mg/kg, concentration of was not obvious. Phosphorus forms in sediments is dominated by IP, shows the release of higher risk. Concentration of TN was deliver period> non- deliver. Content decreases from the center to the periphery of the trend of the library,the mean of TN is 4733.96mg/kg. Correlation between morphology and size of TN for nitrogen was NTN>SAEF-N>SOEF-N>IEF-N>WAEF-N. There was significant positive correlation between SAEF-N and SOEF-N(P<0.05). SAEF-N and SOEF-N was nitrogen form major conversion in sediment. In the reservoir area of the Yuqiao reservoir in sediment role of nitrogen, phosphorus is "sink", but phosphorus forms in sediment was to change the role of "source" trend. The main source of Yuqiao reservoir in sediment is not the nitrogen、phosphorus in water. Reservoir hydraulic condition of water in the process of deliver period have a certain impac the nitrogen、phosphorus in sediments change.(3) The Research area is agriculture and animal husbandry not have centralized sewage outfall. Industrial pollution sources into the research was weaked. Agricultural non-point source pollution for TN pollution contribution rate is higher, mainly to the effects accounting for 57.2% of Shahe basin.Agricultural non-point source pollution and cage aquaculture pollution of Daheiting reservoir has a direct influence on the Luanhe River water quality, pollution of nitrogen accounted for 32.1%. Accounting for 93.7% of phosphorus pollution contribution is the main of research area from the cage aquaculture production. |
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