CAJ | 학술논문

以Iowa磷指数模型为基础，根据中国高原特征并参考其他磷指数模型评价体系对其进行简化和修正，建立了中国高原农业流域磷指数评价体系，并以洱海源头典型小流域凤羽河流域为例，分别对溶解态磷和颗粒态磷面源流失风险进行了评价及关键源区的识别。结果表明，两种形态的磷流失较高和最高风险区均分布于河流两侧100 m的范围内。溶解态磷流失较高和最高风险区主要为河流中下游的农田区，而颗粒态磷流失较高和最高风险区在河流上游草地和河流中下游的农田区均有分布；溶解态磷流失关键源区为中下游河流两侧100 m范围的农田区，颗粒态磷流失关键源区为上中下游河流两侧100 m范围的草地和农田。研究结果为实现流域面源磷流失高效防控奠定了基础，同时表明新建立的磷指数评价体系适用于高原流域开展磷流失风险评价及关键源区识别。
이Iowa린지수모형위기출，근거중국고원특정병삼고기타린지수모형평개체계대기진행간화화수정，건립료중국고원농업류역린지수평개체계，병이이해원두전형소류역봉우하류역위례，분별대용해태린화과립태린면원류실풍험진행료평개급관건원구적식별。결과표명，량충형태적린류실교고화최고풍험구균분포우하류량측100 m적범위내。용해태린류실교고화최고풍험구주요위하류중하유적농전구，이과립태린류실교고화최고풍험구재하류상유초지화하류중하유적농전구균유분포；용해태린류실관건원구위중하유하류량측100 m범위적농전구，과립태린류실관건원구위상중하유하류량측100 m범위적초지화농전。연구결과위실현류역면원린류실고효방공전정료기출，동시표명신건립적린지수평개체계괄용우고원류역개전린류실풍험평개급관건원구식별。
Based on Iowa P index model and other P index evaluation systems, a Highland Agricultural Watershed P Index Evaluation Sys-tem(HAWPES)was developed and used to assess the risk of P loss and identify critical source areas by taking Fengyu River watershed, Yunnan Province as an example. Phosphorus losses in dissolved(runoff)and particulate(erosion)forms were assessed. High risk areas of P loss were located within the extent of 100 meters away from both sides of the river. Dissolved P losses mainly occurred in the farmland areas in middle and lower parts of the river, while particulate P losses happened both in farmland areas in middle and lower parts of the river and in the meadows in the upper part of the river. These results provide a basis for an effective and efficient watershed environmental manage-ment plan. The study reveals that this new P index evaluation system could be applied successfully to assessment of P loss risk and identifi-cation of critical source areas for watershed best environmental management.