Construction, Evaluation And Design Of Riparian Zone Of Qinhe Basin Of Shanxi Province

The environmental problem caused by the world's attention is agricultural non-point source pollution of water bodies has become a major source of pollution. Riparian zone has played the role of water quality protection through a series of physical, chemical and biological processes to reduce the runoff from a variety of pesticides, sewage and industrial emissions of concentration. Research of Riparian zone's evaluation indicators and building model has provided a theoretical basis for China's other rivers, lakes and reservoirs, and other riverside vegetation zones.The Qinhe source is targeted in this study for many trials, such as the impaction on section's water quality objectives of land-use types, the interception of chemical fertilizers with riparian zone, the restoration of riparian zone and other aspects of the trials, the establishment of intercept width model and rehabilitation measures of riparian zone; At the same time establishment of the structural integrity and stability of evaluation index system of riparian zone, and evaluation of Chishiqiao river's and Zihong river's structural integrity and stability and overall situation of Qinhe's riparian zone, providing the basis for building models with riparian zone.The results show that:(1) Land-use types has some extent affected on water quality indicators in the concentration of NO₂^-,NO₃^-,NH₄⁺,PO₄^3- and value of pH, hardness and total hardness.(2) 18°grassland has higher interception rate than 30°grassland on concentration of NO₂^-,NO₃^-,NH₄⁺,PO₄^3- of urea, potassium sulfate, compound fertilizer solution, the same collocation with trees brushes and grasses has higher interception rate than collocation with brushes and grasses. (3)Wetlands has higher interception rate than river water on concentration of NO₂^-,NO₃^-,NH₄⁺,PO₄^3- and value of pH of urea, potassium sulfate, compound fertilizer solution.(4)Soil keeping fertility and soil nutrients have increased after Riparian zone were building with different collocation with vegetation.(5)Three typical plots have different tending measures under the river recovery, conclusion that appropriate rehabilitation measures.(6)Evaluate overall situation of riparian zone of Chishiqiao river's and Zihong river's with Selected the index system of riparian zone with structural integrity and stability, evaluation results: Chishiqiao river's Conditions for good grades, Zihong river's conditions for the general status, The main problem is: riparian zone with a lower plant species richness, monotonous collocation with vegetation,and vegetation coverage is not high.(7) Conclusion that building models of Qinhe riparian zone——forests, cropland, road with riparian zone.