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首页> 外文期刊>Society and Natural Resources >Patterns of Irrigated Agricultural Land Conversion in a Western U.S. Watershed: Implications for Landscape-Level Water Management and Land-Use Planning
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Patterns of Irrigated Agricultural Land Conversion in a Western U.S. Watershed: Implications for Landscape-Level Water Management and Land-Use Planning

机译：美国西部流域灌溉农业土地的转换模式：对景观级水管理和土地利用规划的启示

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摘要

In irrigated agricultural landscapes, land-use conversion may have landscape-level social, hydrological, and ecological effects. We used geographic information systems (GIS) and interviews to analyze development effects on irrigation in the Henry's Fork Watershed, Idaho. Farmers developed irrigation there in the 19th century, and incidental recharge from canal seepage and flood irrigation raised groundwater levels and expanded wetlands. Cohesive culture in agricultural communities sustained irrigation systems until amenity-driven demographic shifts beginning in the 1970s led to development approved by local governments with land-use planning but no water-management authority. Although only 5% of irrigated land has been converted, development has fragmented irrigated landscapes and made canal-system operation more difficult, potentially reducing groundwater levels, wetland extent, and return flows critical to downstream irrigators and fish and wildlife. We discuss future scenarios, highlighting the need for increased communication among local and state governments regarding land use and water management in irrigated landscapes across the West.
机译：在灌溉的农业景观中，土地利用转化可能对景观产生社会，水文和生态影响。我们使用了地理信息系统（GIS）和访谈来分析爱达荷州亨利福克斯分水岭对灌溉的发展影响。农民在19世纪在那里发展了灌溉，运河渗水和洪水灌溉带来的偶然补给提高了地下水位并扩大了湿地。农业社区的凝聚力文化维持着灌溉系统，直到1970年代开始由人口驱动的人口结构转变导致地方政府批准了土地利用规划，但没有水管理当局的批准。尽管只有5％的灌溉土地被改建，但发展使灌溉景观变得支离破碎，并使运河系统的运营更加困难，有可能降低地下水位，湿地范围以及对下游灌溉者，鱼类和野生动植物至关重要的回流。我们讨论了未来的情况，强调了地方和州政府之间在西部灌溉景观中土地使用和水管理方面需要加强沟通的需求。

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