Laserfiche WebLink
- June 21. 2000 <br /> Job Number. LG00-173 <br /> Page 10 <br /> To estimate the deep percolation of rain fall, it is assumed that if rainfall in a given month <br /> is greater then potential ET, the difference percolates into the ground. This assumes that no run <br /> off occurs on a flat site. The deep percolation of rain fall at the site is estimate to be 7.86 <br /> inches/year. See Table 3 for data. The average nitrate concentration of rainwater was discussed <br /> by Hantzshe and Finnemore' and is reported to be about 0.17 mg/1-N. <br /> Table 4. <br /> Deep Percolation of Rain based on Average Rainfall in Lodi, CA. <br /> strmate <br /> * Potential ET **Precipitation Deep Percolation of Rain <br /> Month (in/mo) (in/mo) (in/mo) <br /> Apr 4.02 1.48 <br /> May 4.31 0.37 <br /> Jun 6 48 0.13 <br /> Jul 7.72 0.06 <br /> Aug 7.03 0.06 <br /> Sep 4.72 0.35 <br /> Oct 3.14 0.86 <br /> Nov 0.96 2.42 1.46 <br /> Dec 0.83 2.93 2.10 <br /> Jan 0.43 3.34 2.91 <br /> Feb 1.16 2.55 1.39 <br /> Mar 2.82 2.61 <br /> -SHbLdAL- 43, 17.16 7.86 izL&r <br /> * Source: CIMS, California Department of Water Resources. <br /> ** Source: USDA Soil Conservation Service, San Joaquin County, CA- <br /> Assumption: <br /> AAssumption: If monthly precipitation exceeds potential ET then the difference is potential deep <br /> percolation. Assume no runoff for level site. <br /> ' peRfoy <br />