Changes

==Planning==

==Planning==

The gravel diaphragm serves two purposes. First, it acts as a pretreatment device, settling out coarse particles before they reach an [[infiltration]] practice. Second, it acts as a level spreader, maintaining sheet flow as runoff flows over the filter strip. If the contributing drainage area is steep, then larger stone should be used in the diaphragm,

The gravel diaphragm serves two purposes. First, it acts as a pretreatment device, settling out coarse particles before they reach an [[infiltration]] practice. Second, it acts as a [[level spreader]], maintaining sheet flow as runoff flows over the filter strip. If the contributing drainage area is steep, then larger stone should be used in the diaphragm,

*Diaphragms can be designed along curves as readily as straight lines,  

*Diaphragms can be designed along curves as readily as straight lines,  

*As they are not a conveyance practice, they should be designed along a single contour line, promoting the level spreading function,   

*As they are not a conveyance practice, they should be designed along a single contour line, promoting the level spreading function,