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首页> 外文期刊>Journal of the American Water Resources Association >MINIMUM WET-SEASON FLOWS AND LEVELS IN SOUTHWEST FLORIDA RIVERS
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MINIMUM WET-SEASON FLOWS AND LEVELS IN SOUTHWEST FLORIDA RIVERS

机译：西南佛罗里达河流的最低湿季流量和水位

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摘要

Regulation of river flows can result in decreased stage fluctuations and alteration of inundation patterns of floodplain wetlands. However, floodplain inundation has historically not been addressed in most minimum flow determinations. Florida law requires the water management districts of the state to establish minimum flows and levels to protect water bodies from significant harm associated with water withdrawals. The Southwest Florida Water Management District utilizes a 15% reduction in habitat criterion as a threshold for defining significant harm to freshwater segments of rivers. Utilizing a multi-parameter approach and different habitat measures for seasonal flow periods, the District has recommended minimum flow compliance standards for the Alafia, Myakka and middle Peace rivers. For the high-flow period, the District utilized a 15% reduction in the number of days of floodplain inundation (a temporal loss) as a significant harm threshold. This approach yielded allowable flow reductions of 8% for the Alafia and Peace rivers during the high-flow season and a 7% allowable reduction of natural flows on the Myakka River. Comparison of changes in flows associated with temporal and spatial loss thresholds indicated that flow reductions required to effect a 15% spatial loss of habitat on the Alafia, Myakka and middle Peace rivers are higher than those that would yield a 15% temporal loss. This indicates that with respect to natural flow protection, the District's consideration of temporal reductions in habitat for establishing minimum river flows for seasonal high-flow periods is more conservative than the use of a spatial loss criterion.
机译：调节河流流量可以减少阶段性波动，并改变洪泛区湿地的淹没方式。但是，在大多数最小流量确定中，洪泛区淹没历史上从未得到解决。佛罗里达州法律要求该州的水管理区建立最低流量和水位，以保护水体免受与取水有关的重大伤害。西南佛罗里达水管理区利用栖息地标准减少15％作为界定对河流淡水部分重大危害的阈值。对于季节性流量，该地区采用多参数方法和不同的栖息地措施，为阿拉法河，米亚卡河和和平河中游提出了最低流量合规标准。在高流量时期，该地区将洪泛区淹没天数（时间损失）减少了15％，将其作为重要的危害阈值。这种方法在高流量季节使Alafia和Peace河的允许流量减少了8％，而Myakka河上的自然流量允许减少了7％。比较与时间和空间损失阈值相关的流量变化，结果表明，在阿拉法河，米亚卡河和和平河中，使栖息地的空间损失达到15％所需的流量减少量要比造成时间损失15％的流量要高。这表明，在自然流量保护方面，该地区考虑临时减少栖息地以在季节性高流量时段确定最小河流流量要比使用空间损失标准更为保守。

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