近幾年來政府每每在「大自然反撲」威脅下，特別重視環境與國土保安之落實，其中河川為天然洪水排洩之地區，基於維護民眾生命財產安全之需，政府實施「河川區」劃定政策乃屬必要。然由於事涉區內土地所有權人之權益至鉅，民眾抗爭時起，導致政府施政裹足不前，連帶影響「河川區」劃定政策之執行效力。本文有鑑於此，擬在「制度分析與發展架構」（Institutional Analysis and Development Framework；簡稱IAD）理論上，輔以法制分析就相關議題加以探討。在文章結構安排上，首先評介IAD等相關文獻，藉以作為本文之理論基礎，繼之，從河川區內土地所有權人之觀點，在「財產權保障」之基礎上研析「河川區」劃定政策之相關議題（爭點），最後本文試圖在IAD基點上，從法制與衝突解決觀點就上述議題提出淺見，以供主管機關未來實施「河川區」劃定政策之參考。

Recently, the Taiwan area is under the stronger pressure from the natural disaster. The Government, therefore, is try to solve this issue based on the environmental conservation policy and related measures. Meanwhile, the establishment of the “river zone” is become the most important instrument (management). However, few researchers have focused their attention on examining the important legal institutional challenges surrounding this ecosystem-based management. Though the enforcement of this management has much restriction on the private land-use in the “river zone”. This paper is therefore to analyze related issues based on the concept of the "IAD". In addition, the legal institution approach will be used in the analysis. The structure of this paper can be described as follows: first, the "IAD" and the related literatures will be also reviewed, second, some issues will be analyzed on the viewpoint of the “property rights protection”. At last, some important suggestions will be proposed for the Government.