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首页> 外文期刊>Journal of the American Water Resources Association >Hydrologic Resilience from Summertime Fog and Recharge: A Case Study for Coho Salmon Recovery Planning
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Hydrologic Resilience from Summertime Fog and Recharge: A Case Study for Coho Salmon Recovery Planning

机译：夏季雾和补给的水文复原力：以银鳕鲑鱼恢复计划为例

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摘要

Fog and low cloud cover (FLCC) and late summer recharge increase stream baseflow and decrease stream temperature during arid Mediterranean climate summers, which benefits salmon especially under climate warming conditions. The potential to discharge cool water to streams during the late summer (hydrologic capacity; HC) furnished by FLCC and recharge were mapped for the 299 subwatersheds ranked Core, Phase 1, or Phase 2 under the National Marine Fisheries Service Recovery Plan that prioritized restoration and threat abatement action for endangered Central California Coast Coho Salmon evolutionarily significant unit. Two spatially continuous gridded datasets were merged to compare HC: average hrs/day FLCC, a new dataset derived from a decade of hourly National Weather Satellite data, and annual average mm recharge from the USGS Basin Characterization Model. Two use-case scenarios provide examples of incorporating FLCC-driven HC indices into long-term recovery planning. The first, a thermal analysis under future climate, projected 65% of the watershed area for 8-19 coho population units as thermally inhospitable under two global climate models and identified several units with high resilience (high HC under the range of projected warming conditions). The second use case investigated HC by subwatershed rank and coho population, and identified three population units with high HC in areas ranked Phase 1 and 2 and low HC in Core. Recovery planning for cold-water fish species would benefit by including FLCC in vulnerability analyses.
机译：在干旱的地中海气候夏季，雾气和低云量（FLCC）以及夏末的补给增加了溪流基流并降低了溪流温度，这尤其在气候变暖条件下使鲑鱼受益。 FLCC提供的在夏季末向河流排放冷水的潜力（水文能力； HC）和补给，是根据国家海洋渔业服务恢复计划中优先进行恢复和重建的299个小流域绘制的，这些小流域排在核心，第一阶段或第二阶段。对濒临灭绝的中加州海岸Coho Salmon具有重大意义的威胁的威胁削减行动。合并了两个空间连续的网格数据集以比较HC：平均小时/天FLCC，从十年一小时的每小时国家气象卫星数据中获得的新数据集以及来自USGS盆地特征模型的年平均mm补给量。两种用例场景提供了将FLCC驱动的HC指数纳入长期恢复计划的示例。首先，在未来气候下进行热分析，在两种全球气候模式下，预计8-19户Coho人口单位流域面积的65％在热上不适宜居住，并确定了几个具有高复原力的单位（在预计变暖条件范围内高HC） 。第二个用例按分水岭等级和银大麻哈鱼种群调查了HC，并确定了在第1和第2阶段地区HC较高而在Core HC较低的三个人口单位。将脆弱性分析和控制纳入脆弱性分析将使冷水鱼类物种的恢复计划受益。

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