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英文文献：Efficient Patterns Of Conservation Activities In A Watershed: The Case Of The Grande Ronde River, Oregon-流域保护活动的有效模式:俄勒冈州格兰德隆德河的案例
英文文献作者：Watanabe, Michio,Adams, Richard M.,Wu, JunJie
英文文献摘要：
This research examines a spatially explicit allocation of habitat restoration activities in an Oregon watershed to meet water temperature targets for the benefit of endangered salmonid fish species. Integrating hydrological, biological and economic models, a series of optimization problems are investigated for different policy targets including temperature reductions and enhanced fish populations. Results indicated that the heterogeneous nature of riparian conditions and stream morphology needs to be considered if restoration activities are to be allocated efficiently in a watershed. We also found that it is less costly to implement restoration activities in tributaries if the objective is to maximize stream length where water temperatures decrease by a certain degree. Although temperature reductions are primarily achieved by shading in nearby reaches, if a desired level of temperature reductions increases, then it is necessary to apply restoration efforts in remote reaches.
本研究考察了俄勒冈流域栖息地恢复活动的空间明确分配，以满足水温目标，从而有利于濒危鲑鱼物种。综合水文、生物和经济模型，研究了一系列不同政策目标的优化问题，包括降低温度和增加鱼类种群。结果表明，如果要在流域内有效地分配恢复活动，就需要考虑河岸条件和河流形态的异质性。我们还发现，如果目标是在水温下降一定程度时最大限度地延长河流长度，那么在支流中实施恢复活动的成本更低。虽然温度降低主要是通过在附近区域遮阳来实现的，但如果所需的温度降低水平增加，则有必要在偏远地区进行恢复。
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