Vegetation Landscape Function Evaluation Based On GIS

In order to verify the applicability of the appraisal method about the landscapefunctions, LFA method for short, in studying areas, and at the same time using the studyingways to make comprehensive assessment of the applicability of regional vegetation andlandscape features. Beigou forest farm, Mulan paddock, in Hebei province as a study areaand having LFA based on GIS-assisted, this research surveys7different types ofvegetation, to monitor and analyze the vegetation landscape in different functional study onindicator system.The results showed that:(l)LFA method have a good application in the area, so it can become a quick andquantitative appraisal method of landscape functions for different types of vegetation andland in Beigou Forest Farm. Utilizing the LFA method to provide the indicators of thepatch area, the indicators of the landscape instruction, the indicators of the soil structuralstability, the indicators of the soil structural permeability, the indicators of the soilstructural nutrient circulation, we could better appraise the human influence of thelandscape functions of artificial woodland and the soil performance, and the result is amatch case of the physical truth.(2)According to the five indicators like patch area and so on in LFA method, the valueof variables-landscape functions which comprehensively reflected the landscape functionsin the studying area can be calculated by weighted sum. The theory value of the landscapefunction is between0and55.If the value is greater, then the plaque retain function is better,the soil structural stability is more significant, the soil structural permeability is stronger,and the soil structural nutrient circulation is more active.(3) Based on65different vegetation types of landscape functions of monitoring andevaluation results of clustering, classification. The landscape functions level can be carvedup to four classes: badly, normally, better and best, value range respectively [0,11],[11,20],[20,32],[32,55]. Using this classification, the landscape functions level of the differenttypes of the studying area can be divided more quickly and exactly.(4)The whole landscape functions level in the study area belongs to the better part, thefewer landscape feature belongs to the general level, the more little landscape feature belongsto the high level, and only a very small landscape feature belongs to the worse level. The studyarea should reduce the number of the common agricultural land, and apply to the forestation ofthe wide and large areas.