Common use of Flow Accumulation Threshold Clause in Contracts

Flow Accumulation Threshold. There is no basis for choosing a particular flow accumulation threshold to identify perennial initiation points for streams. Weather, slope, geology, and vegetation, among other things, all impact how water flows and accumulates across a surface. Each stream will have a unique combination of factors such that, no one threshold number will be appropriate for all streams. In previous work done by the DNR to classify streams for fish presence (Conrad, Fransen, Duke, Liermann, & Xxxxxxx, 2003), (Fransen, Duke, XxXxxxx, Xxxxxx, & Xxxxx, 2006), a threshold of 3.7 acres, or 1.5 hectares, was used. The 1.5-hectare number was also used for this project. The exact number is not important, so long as the size of the contributing area is sufficiently small. This may result in pushing initiation points slightly further upstream, but this is more appropriate than having them too low.

Flow Accumulation Threshold. There is no basis for choosing a particular flow accumulation threshold to identify perennial initiation points for streams. Weather, slope, geology, and vegetation, among other things, all impact how water flows and accumulates across a surface. Each stream will have a unique combination of factors such that, no one threshold number will be appropriate for all streams. In previous work done by the DNR to classify streams for fish presence (ConradXxxxxx, FransenXxxxxxx, Duke, LiermannXxxxxxxx, & Xxxxxxx, 2003), (Fransen, Duke, XxXxxxx, Xxxxxx, & Xxxxx, 2006), a threshold of 3.7 acres, or 1.5 hectares, was used. The 1.5-hectare number was also used for this project. The exact number is not important, so long as the size of the contributing area is sufficiently small. This may result in pushing initiation points slightly further upstream, but this is more appropriate than having them too low.