Study On Daling River Physical Structure Integrity Of River Health Survey Technology And Calculation Method

Rivers provide shelter to tens of thousands of life on the earth and provide sufficientwater resources and food for human. As the main carrier of the water cycle, the rivers havea positive effect on regional climate. With the excessive exploitation and destruction on therivers, the natural forms of rivers changed, the water quality was contaminated, the healthwas at stake and the contradiction between the economy and the environment wasbecoming more and more significant. River health had a serious impact on thedevelopment of human society. The rivers cut-out and water pollution made both sidesalong the river fall into the position without water and made the normal production andliving difficult to sustain. How to systematically evaluate the river health was takenseriously in the study of river, how to managing the unhealthy rivers became the directionof people’s exploration. The transformation of river evaluation concept enabled people torealize that the sustainable use of river resources was not only for creating economicbenefits, but also for the sustainable development of human society and the healthy rivershad a profound significance in the development of human society. River health is a naturalgood condition in the aspects of physics, chemistry and ecology, with sustainable socialfunction, which is expressed by the integrity. This article studied the physical structuralintegrity of the rivers, with the DaLing river in Liaoning province as the experimental unit.The main research results were as follows:1、By combining the research course of river health and river evaluation system athome and abroad,that the article defined the time scale and space scale of the assessmenton physical structural integrity and put forward the assessment method system of physicalstructural integrity, with selecting of riparian zone, river connecting block conditions andnatural wetlands retention rate as the survey indicator of physical structural integrity.2、Confirmed the principle of the river assessment and the selection of monitoringcross section. Make a scientific classification for Daling river, Combining existinghydrology and water quality monitoring sections, and the main tributaries of the riverestuary and the upper and lower control section, and the reservoir upstream anddownstream of the reservoir control section, and the county level city river flows throughthe river control section. Selected17monitoring cross section data investigation and assigncalculate.3、According to different influence of each physical structure integrity index, adopt the gradation index evaluation method. Calculation index score respectively, weighted bylevel, and making use of the results to comprehensive empowerment. It obtained theobjective and reasonable river physical structure integrity results.4、Aiming at the effects of various indicators on river physical structure integrity,Grading index score, Index scores are calculated respectively, Progressively weighted, andusing the comprehensive weight is assigned to the results of the survey, get the riverphysical structure completeness rating results Objective and reasonable.5、 Determined by calculating the Daling physical structural integrity score,comparative assessment scale, determine Daling river physical structure integrity issub-health, to provide the scientific basis for the management and remediation of Dalingriver physical structure.