The drawing above shows our planning for installing three cisterns, and building earthworks, two rain gardens, and a pond. The drawing also indicates the location of water slowing devices located along a ditch forming down the south side of our gravel driveway. The contour runs generally southward. The house is located at the top of the hill.
According to the Technical Guidance: Stormwater Treatment Credit for Rainwater Harvesting, we will need cisterns about the house capable of handling 3,000 gallons of 24-hour water flow (1 year). This is based on government's 1 Year 24 Hour Storm Rainfall in Tryon, 3.93 inches. (See National Oceanic and Atmospheric Administration of the United States Dept. of Commerce, National Weather Service, NOAA ATLAS 14 POINT PRECIPITATION FREQUENCY ESTIMATES: (Tryon, North Carolina, US (31-8744)).
My calculations are located at this link.
According to the Technical Guidance: Stormwater Treatment Credit for Rainwater Harvesting, we will need cisterns about the house capable of handling 3,000 gallons of 24-hour water flow (1 year). This is based on government's 1 Year 24 Hour Storm Rainfall in Tryon, 3.93 inches. (See National Oceanic and Atmospheric Administration of the United States Dept. of Commerce, National Weather Service, NOAA ATLAS 14 POINT PRECIPITATION FREQUENCY ESTIMATES: (Tryon, North Carolina, US (31-8744)).
My calculations are located at this link.
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