摘要：非點源污染為永續發展指標（Sustainable Development Goals, SDG）下，乾淨用水(clean water)中的棘手環境問題，主要的困難點在於：營養鹽在流動的過程中受物理與生物作用的轉換導致來源的鑑定困難，且在肥料使用上又需與權益關係人（stockholder, 如：地主）協調、合作施肥方式的改變。可惜的是，傳統上處理集水區經營治理的方式常僅以水文或水質研究為主，雖然成果豐碩但欠缺兩者的緊密合作，也欠缺從坡地到集水區尺度的綜觀研究。本計畫從LID的設計、茶園慣行施肥的調查、土壤水份與營養鹽在LID中的流動以及到地表逕流、河水的採樣與監測，藉此瞭解水文反應(hydrologic response, celerity and velocity)與營養鹽移動(pollutant transport, velocity)的差異，來評估LID的效能。同時，地表逕流與河水的監測，協助SWMM、SWAT模式發展以建置最佳化施肥策略評估流程以優化台灣的集水區經營策略，邁向永續發展。
Abstract: Clean water is one of sustainable development goals, in which the non-point source pollution caused by over-fertilizer application is very difficult to identify and determine. The difficulties come down to the transport and transfer of the non-point pollutants. The uncertainty of non-point pollutant transport by runoff is due to spatial heterogeneity and time-variance; on the other hand, the geobiochemical transfer (e.g. mineralization and absorption) during pollutant transport is quite conditionally dynamic. So far, the most studies for this issue focus on the variation of water quantity and quality, whereas few studies focus on the transport and transfer from crop field to stream. This study aims to understand the hydrologic response and pollutant transport in tea fields. Meanwhile, the runoff water and nutrient concentrations in the paired tea fields contrasting by LIDs (low impact devices) are monitored to understanding the performance of LIDs in pollutant reduction. Besides, SWMM and SWAT are applied to evaluate the fertilizer strategies for optimizing watershed management.
non-point source pollution
low impact device