Evaluation Of Tanghai Wetland Health Conditions

The wetland plays an important role bettwen mankind and the nature, thewetland ecosystem health assessment is an important basis for the study of wetlandhealth. we use quantitative analysis method to evaluate the wetland ecosystem health,to make up for the lack of qualitative evaluation of the past, this has guidingsignificance on wetland ecosystem restoration and reconstruction.Tanghai wetland is located in Tanghai County of Tangshan City in HebeiProvince, belongs to the coastal wetlands, in recent years, local residents overreclaiming land from the lake and unlimited travel, the wetland ecosystem in Tanghaiis facing a huge damage, greatly changed the ecological environment of wetland,wetland protecting ecosystem stability decreases, natural wetlands in total wetlandarea accounted for the proportion of reduced day by day, and the artificial wetland inpaddy field, ditch wetland as the representative of the occupying area is increasing,with the residents of Tanghai Wetland Using increase strength, the traditional naturalwet to play the role of water conservation, conservation of biological diversity isreduced continuously.This article first selected remote sensing images in1989and2009two years ofwetland in Tanghai, the first of these two years of remote sensing image geometriccorrection; secondly, the boundary of Tanghai County for cutting of the remotesensing image, get the image of Tanghai County; third, compared with the GoogleEarth supervised classification of remote sensing images, river wetland reed,respectively wetland, residential land, beaches, farmland, reservoirs, ponds wetlandand paddy field distribution. Based on the classification of remote sensing imageprocessing, analysis software of the characteristics of the analysis, the change oflandscape pattern in this period Tanghai wetland results show that the use ofFRAGSTAT3.3landscape fragmentation degree of Tanghai wetland, deepening. Onthe basis of wetland degradation driving force analysis, based on the PSR(Pressure-State-Response)20index model selection conditions affect the health of wetland in Tanghai, of which4pressure index,7state indicators and9indicators,using the indicator of these20indexes, reflecting the2003-2012years of Tanghaiwetland health status, the results show: the health index of wetland in Tanghai fellfrom0.57in2003to0.29in2012, indicating a decline in Tanghai wetland healthconditions, and toward the pathological development trend, Tanghai wetlandprotection work be imperative.