A Comprehensive Assessment Of The Green-land System Health In The City In The Arid Areas

This paper aims at the center area of Kelamayi city and gives the comprehensive assessment of its Green-land System Health. Taking city Green-land system of the arid areas stability and sustainable as a goal, we has constructed a set of multistage syntheses evaluation system under the different level based on system structure and function aspect and so on. Use method of scoring by specialist and the Analytic Hierarchy Process (AHP) to confirm indexes and ensure the weight of them. Use integrated evaluation and restricting factors evaluation on modeling. Use cumulating frequency to class the health index. So we can give a comprehensive assessment of the Green-land System Health in the center area of Kelamayi city. The result shows: Among the 31 evaluating indexes of the Green-land System Health in the center area of Kelamayi city, The soil ulmin content, the suitable tree seed in local place, the management fund investment and the irrigation water have the most important influence in the Green-land System. However the solid carbon releases the oxygen ability and dust thesterilization ability have less impact. Based model to account health index and plot out the indexes three classes by the inflexion in the figure of cumulate frequency, over 0.633, from 0.447 to 0.633 and below 0.447.We assess the Green-land System Health in the center area of Kelamayi city though the result of health indexes'classification and all kinds of health condition area proportion. There are 10 health green samples and the area is 2.92hm2 accounting for the total area 28.63%; There are 21semi-health green samples and the area is 6.48hm2 accounting for the total area 63.53%; There are 4 unhealth green samples and the area is 0.8hm2 accounting for the total area 7.84%.According to the synthetically decision, the most part of the Green-land system in the center area of Kelamayi city is between semi-health and health. The road green-land and the protection green-land are unhealth. There are four factors influencing the Green-land system. Connecting to the Green-land system resources in the center area of Kelamayi city and management condition investigation, this article proposed the way to change the center area of Kelamayi city semi-health and unhealth green-land management, including: strengthen to apply fertilizer management; increase the soil fertility; improve the soil themicrobiology condition environment and balance the soil microorganism area department. Strengthen the plant being suitable research, apply more local plants and reduce the plants which don't fit Kalamayi city ecological environment; Strengthen the investment of management fund, especially to the road green-land, protection green-land as well as the urban fringe area; Guarantee the enough irrigation water in Spring and Autumn and so on.