|
MW
<br /> Wastewater Treatment System 'WAW ..�
<br /> FALL CREEK
<br /> Engineering Report ENGINEERING,INC.
<br /> -
<br /> 4.2.1. Water Balance Calculation for Average Annual Rainfall
<br /> The estimated flow rates for the 10-year plan is approximately 0.5 million gallons of process
<br /> -
<br /> water is generated per year. Table 4.1 presents the results of the water balance calculations
<br /> based on this process water estimate and the stormwater flow in an average rainfall year (0.5
<br /> r` million gallons). The water balance calculations show that during average rainfall years, the
<br /> fields perform hydraulically without any overflow.
<br /> Table 4.1. Water Balance Calculations for the System
<br /> in an Average Rainfall Year (17.9 inches/year).
<br /> t1..
<br /> %w Wetland Grass Stomwater Detention Area
<br /> Process water Storm-water Direct Wetland ET %9.
<br /> tland Direct Grass Excess Direct
<br /> Month Flow(gal) runoff(gal) Rainfall (gal) tflow Rainfall Grass ET Infiltration Water Rainfall ET Infilmon Storage Overflow
<br /> Pt(gal) St(gal) RWt I) EWt al) t al) RGt al) EGt al) IGt al OGt all RPt(al) EN I IN a1 SPt al) Opt
<br /> January 4,891 114,270 21,917 5,30900,959 30,469 7,381 244,404 - 18,653 5,498 149,620February 16,565 107,548 20,628 8,365136,375 28,677 11,630 244,404 - 17,555 9,621 149,620March 18,340 82.561 15,835 16,257100,478 22,014 22,601 244,404 - 13,477 19,242 149,620April 17,748 36,093 6,923 24,85235,912 9,624 34,549 244,404 - 5,892 30,042 149,620 - -
<br /> May12,226 18,985 3,641 34,433 69,618 420 5,062 47,869 244,404 - 3,099 43,983 149,620 - -
<br /> June 11,832 2,989 573 40,737 44,275 - 797 56,633 244,404 - 488 44,375 149,620 - -
<br /> July 12,226 1,063 204 41,275 16,493 - 283 57,381 244,404 173 56,549 149,620 - -
<br /> August 73,358 264 51 36,124 54,042 - 70 50,220 244,404 43 48,499 149,620 - -
<br /> Septerriter 118,320 8,027 1,540 27,079 69,618 85,231 2.140 37,646 244,404 - 1,310 36,325 149,620 - -
<br /> Octobe 103,924 34,220 6,563 17.018 69,618 127,690 9,124 23,658 244,404 - 5,586 21,991 149,620 - -
<br /> November 47,328 61,413 11,779 8,694 69,618 111,825 16,375 12,087 244,404 - 10,025 9,621 149,620 - -
<br /> Decernkr 48,906 80,050 15,354 4,449 1 69,618 1 139,861 1 21,345 6.185 244,404 13.067 1 5,301 1 149,620 -
<br /> Total 485.664 547,482 105,006 264,593 838,751 145,981 367,840 2,932,851 89,367 331,048 1,795,440 -
<br /> 4.2.2. Water Balance Calculations for High Annual Rainfall
<br /> Table 4.2 presents the results of the water balance calculations based on the same process flow
<br /> rates as above and projected stormwater flows in a high rainfall year. The water balance
<br /> calculations show that the system is adequate to accommodate the current summer and crush
<br /> wastewater flows as well as in high rainfall winter months.
<br /> 1%w Table 4.2. Water Balance Calculations for the System
<br /> in an High Rainfall Year(35.8 inches/year)
<br /> �. Wetland Grass Stormwater Detenuon Area
<br /> Process water Stor in-ler Direct Wedand ET Welland Wefland Direct Grass Excess Direct
<br /> - Month Oow(gal) runolf(gal) Rainfall (gal) Storage Outflow Rainfall Grass ET Infiltration Water Rainfall ET t
<br /> Storage Overflow
<br /> _
<br /> Pt(gal) SO a]) RWt((gal) EWt(aq SWt((gal) OWt((gal) RCA(gad) EGt((gal) IGt(gal) OGt((gal) RPt(gal) EN((gal) SPt(al) Opt
<br /> January 2,055 213,851 43,834 5,309 69,618 44`1.405 60.938 7.381 244,4(" 258,558 37,305 5498 140.746 -
<br /> February 6.%2 181,794 41,255 8,365 69,618 221,645 57,354 11,630 244404 22.965 35,111 9,621 39,580 -
<br /> �" March 7,707 154.509 31670 16,257 69,618 177,629 44,028 22,601 244,404 - 26,953 19,242 - -
<br /> Apn1 7.459 65,367 13,845 24,852 69,618 61,820 19,248 34,549 244.404 - 11783 30,042 -
<br /> �.. Mar 5,138 35.529 7,283 34,433 69.618 13,517 10,124 47,869 244,404 - 6,198 43.983 149,620 - -
<br /> June 4,973 5.413 1,147 40.737 40,413 - 1,594 56,633 244,404 976 44,375 149,620 - -
<br /> ,- Jul' 51138 1,989 408 41,275 6,673 - 567 57,381 244,404 - 347 56,549 149,620 - -
<br /> August 30,830 494 101 36.124 1.973 - 141 50,220 244,404 - 86 48,499 149,620 - -
<br /> Septembe 49 725 14,538 3,079 27,079 42,237 - 4,281 37,646 244,404 2,621 36,325 149,620 - -
<br /> Octobe 43675 64,041 13,127 17,018 69,618 76.443 18,249 23,658 244,404 - 11,172 21,991 149,620 - -
<br /> Novembe 19,890 111,223 23,558 8,694 69,618 145,977 32,750 12,087 244,404 - 20,049 9,621 149,620 - -
<br /> 14w Decembe 20.553 149,810 30,707 4,449 69,618 196.622 42,689 6,185 244,404 26,134 1 5,301 1 149.620
<br /> Total 204.105 998.559 210.013 264,593 1,343,058 291,962 367.840 2.932,851 281,523 178,734 331,048 1.795 440 -
<br /> r
<br /> r
<br /> Y
<br /> JESSIE'S GROVE WINERY MAY 2002
<br /> �- 17
<br />
|