Prediction Model Of Rocky Desertification Based On Patch Band Coupling Effect

Karst rocky desertification is a kind of extreme degraded ecosystem,seriously restricts the sustainable economic development in Southwest China,rocky desertification has risen to the height of the country,the country has become an environmental problem during 13 th Five-Year focus,due to desertification hazard and control difficult,become the focus of many experts and scholars research on heat and attention.Based on the landscape ecology,the theory circle and the construction of the plaque coupling model in rocky desertification process as an example,the development of rocky desertification is simulated,and the domain and Du'an Yao Autonomous County of the Guangxi Zhuang Autonomous Region Province as the research object,model and computer aided programming model,space by number.To change to 2015 years of rocky desertification in the study area in 2005 was interpreted and predicted.The main results are as follows:(1)According to the theory of landscape ecology,this paper puts forward the concept of patch circle.The circle is a circle system with the center of a patch,the other patches and the buffer.The middle part is the central patch,which extends outward on a certain scale with the shape of the center plate,and the extended part gives the attributes of the surrounding patch elements and the edge attributes.The formation of the above elements is called the ring.(2)Based on the concept of the patch circle and the coupling theory,the author puts forward the concept of the patch ring coupling and constructs the patch Block coupling model.In some principle of geographical attributes is divided into several types of patches,other patches coupling each of the patches and the surrounding contact,closed loop formation at the edge of the patch itself and a plaque ring couplingsystem.The plaque ring coupling model includes three sub modules: core patch module,edge elements module and background module,each module has its own characteristics,before the module and the module in close contact,to ensure the integrity of the whole model of coupled ring patch.(3)The model of patch ring coupling model--a case study of rocky desertification Rocky patch coupling model considering the main circle of science meaning,coupling direction and background,the core module,module and patch edge elements background module instantiated by 2005 to rocky desertification change in 2010,relevant experience factor changes in the process of obtaining,in 2010 the rocky desertification interpretation image as basis,respectively.Simulation development of provincial and county in 2015 of rocky desertification,and in 2015 with the actual interpretation result of differential comparison,results show that the simulation accuracy of provincial county were higher than 60%,the provincial moderate rocky desertification simulation results of more than 65%,a better simulation result.