USING GIS AS A TOOL TO EXECUTE THE FARMLAND RELEASE POLICY WITH CONSIDERING FIELD CONDITIONS

摘要

Taiwan is applying for being a member of WTO. Once Taiwan is accepted by the WTO officials, it will directly cause a great impact to the agriculture. Meanwhile, the more framers demand less restriction for the farmland use in recent years. In other words, the social and economic developments have gradually affected the policy of farmland use. This study emphasizes to determine the methodology for executing the farmland release policy with considering the field conditions such as recharge ability of groundwater, soil liquefaction potential, and groundwater depth. Within the study area, the Lan-Yang Plain, data are collected and analyzed with the aids of Geographic Information System (GIS). Three major items of results are incorporated into the GIS software, ArcView, for the final determination of eight types of sub-region where individual expression is precise. The whole methodology not only takes accounts of various possible parametric studies but also provides a systematic approach through the use of GIS. The authors believe that the Taiwan authorities may or may not officially consider the proposed results but the proposed methodology should be seriously considered for preparing the farmland release policy.