|
<br />MANUAL FOR ESTIMATING FLOOD CHARACTERISTICS
<br />
<br />29
<br />
<br />Examp 1 e 6, --Southern Plateau Reg'ion
<br />
<br />Flood information is required for Hermosa Creek at lower end of Hermosa
<br />Park, 3/4 mi downstream from fo'rks, Hermosa Park (lat 37036'55", long lOr
<br />55'30", sec. 26, T. 39 N., R. 10 W,),
<br />
<br />Map coverage: Elk Creek, Hermosa Peak, Engineer Mountain, Electra Lake
<br />quadrangles, scale = 1 :24,000.
<br />
<br />Parameters
<br />
<br />A=drainage area, In square mi les.
<br />A=37.8 mi2,
<br />
<br />Q10 =59,7AO.709=59,7(37,8)0.709=59,7(13. 1)= 784 ft3/s
<br />Q50 =89,IAO.709=89,l (37,8)0.709=89.1 (13,1)=1,170 ft3/s
<br />Qloo=103Ao.710=103(37,8)0.710=103(13,2)=1 ,360 ft3/s
<br />Q500=137AO.713=137(37,8)o.713=137(13.3)=1 ,820 Ft3/s
<br />
<br />010 =l,25AO.261=l,25(37,8)0.Z61=1 ,25(2,58)=3,2 ft
<br />D50 =1.54Ao.254=l,54(37,8)0.254=l,54(2,52)=3.9 ft
<br />DIOo=1.64Ao.254=l,64(37,8)0.254=1.64(2,52)-L1.1 ft
<br />0500=1. 98AO.239=1. 98 (37,8) o. 239=1,98 (2,38)=4,7 ft
<br />
<br />If desired, use a graphical solution for QIOO and DIOO:
<br />QIOO--Refer to figure 9,
<br />
<br />For A=37.8 mi2,
<br />
<br />From figure 9, Qloo=1,360 ft3/s,
<br />
<br />DIOO--Refer to figure 10.
<br />For A=37,8 mi2.
<br />From figure 10, DIOO=4,l ft.
<br />
<br />I
<br />
|