Study On Temporal And Spatial Distribution Of The Forest And Wetland Anion Concentration In QingDao

The anion that released by the forest and wetland has important ecological functions and is the significant evaluation index.By researching at the temporal and spatial distribution of anion in large scale can give scientific evaluation of ecological service.The article focused on several eco-factors which influence much more on the anion thickness.After doing qualitative,quantitative and visual study on the forest and wetland in Qingdao in large scale,can guide the construction and ecological benefit assessment of anion Bathing Forests.All these depend on the surveyed data,block plan and ALOS image,combining with the spatial statistics and 3S technique. The main results is as following:(1) The spatial resolution of ALOS image is 2.5m.The information of forest vegetation in Qingdao was classified by the method of supervised classification,expert classification and artificial supplement interpretation.The classification precision reaches 86%.(2) Established the temporal and spatial distribution query system of anion based on the ARCGIS desktop,and then realized the quantitative and visual intergrated query through overlay of visual information.(3) The amount of anion that released by forests and wetlands has moderate positive correlation with the humidity,while low negative correlation with the temperature and irrelevant with the altitude. Different type of plants at different growth period showed different peak values of anion concentration from 6 o'clock am.to 21 o'clock.That is to say there is small difference at early growth period and large one at middle growth stage.(4) The first and second grade lay in the popedom of the city,Jiaozhou and Laoshan region at the early growth period.At the same time,the following index come forth,mean concentration 1651 unit /cm~3,average humidity 35.38%RH,mean temperature 16.05℃.The area is 77.01 km~2,between them 40.85 km~2 is forest,wetland area is 0.37 km~2,most influence external distance is 10m.The released ability of anion is changes from forest to wetlands as following,mixed forest＞coniferous forest＞broadleaf forest＞wetlands＞economic forest,forest coverage is 53%.The first and second grade lay in the south of Laixi,Jimo,Chengyang,popedom of the city,Jiaozhou gulf,Laoshan Pingdu and Jiaonan region at the middle growth stage.Just as above,mean concentration 3550 unit/cm~3,average humidity 67.43%RH,mean temperature 26.77℃.The area is 5687.58 km~2,between them 2380.25 km~2 is forest, wetland area is 472.07 km~2.The forest area where the mean concentration of anion is above 3550 unit /cm~3 occupied 53%of land area of the Qingdao city,the biggest influence external distance is 40m.The released ability of anion is:economic forest＞wetlands＞mixed forest＞broadleaf forest＞coniferous forest,forest coverage is 42%,the concentration of anion at middle growth period is 4 times of that at early stage.(5) The structure and function of the analysis and monitoring system of anion temporal-spatial distribution had been confirmed.The Innovative Points:(1) It's the first time to use 3S technique to analyze the temporal-spatial distribution,make the study of anion develop from qualitative and quantitative research to spatial visual research.The structure and function of the analysis and monitoring system of anion temporal-spatial distribution had been confirmed.The system can provide the platform for the research of anion.(2) In the article applied space semi-variant analysis and partial correlation analysis to the research of anion temporal-spatial distribution.,explored the relationship of anion and humidity,temperature, altitude and time in forest and wetland in large scale.Finally got qualitative and quantitative result of anion and correlative environmental factors that happened in different growth stage of vegetation,and the biggest vector distance which influenced by the anion to the surroundings.Then the results can provide reference basis for eco-benefit evaluation of anion and planning of Human Habitation greenbelt.(3) Using the IDW(Inverse Distance Weighted) and spatial overlay analysis method in the study can predict the concentration of anion and correlation factor,mark off the grade distribution of anion concentration in forests and wetlands and make the spatial planning of anion forest bathhouse.