英国诺福克郡,盖伍德流域生态系统服务的估价

盖伍德河是一条稍长于13 km的河,起始于诺福克的乡村,从金斯林流向北海的港口流出.为评价盖伍德河流域内池塘生态系统服务价值的变化情况,采用地理资讯系统比较了该流域内历史的和现在的地图以找出过去50年内的变化,然后通过实地考察来验证地理资讯系统的结果;在文章末尾说明了本研究中所面临的一些困难.分析结果表明近50年来该流...

Valuation of Ecosystem Services in the Gaywood Valley,Norfolk

The Gaywood is a river little more than 13 km's long from its source in rural Norfolk to its entry into the North Sea through the port of Kings Lynn. In order to evaluate the ecosystem services changes of ponds in Gaywood River catchment, Geographic Information Systems(GIS) was used to compare historic map and current map to find out the changes in the past 50 years. In addition, some field work was conducted to verify the results of GIS. Moreover, some challenges of this study were illustrated in the end. The main findings derived from the analysis suggest that the effects on ponds in this area are positive in the past 50 years. However, the quality of some ponds in the river catchment is relatively poor.