|
<br />56
<br />
<br />FLOODS OF SEPT. 1970 IN ARIZ., UTAH, COLO., AND N. MEX.
<br />
<br />STATION DATA-SAN JUAN RIVER BASIN
<br />
<br />57
<br />
<br />(17) 09341200. Wolf Creek near pagosa Springs, Colo.
<br />
<br />(18) .09342500. San Juan River at pagosa Springs. Colo.
<br />
<br />Location. --Lat 37"26'47", long 106053'00", Mineral County, on right bank O. 3 roi (O. 5 Ian)
<br />upstream from Fall Creek and 14 roi (23 Ian) northeast of pagosa Springs.
<br />
<br />DrainaRe area. --14. 0 mi2 (36,3 km2),
<br />GaJ,te-heiJ,t"ht record. --Water-stage recorder graph. Altitude of gage is 7,900 it (2,410 m),
<br />from topographic map.
<br />
<br />Location. uLat 37015'58", long 107"00'37", in NEtSWt sec. 13, T. 35 N., R.2 W..
<br />Archuleta County, on right bank of former bridge site in pagosa Springs. 0.2 roi
<br />(0.3 Ian) upstream from McCabe Creek, 0.6 roi (1. 0 kIn) downstream from bridge
<br />on U. S. Highway 160, and 2 roi (3 kIn) upstream from Mill Creek.
<br />Drainage area. --298 mi2 (772 lun2).
<br />
<br />Discharge record. --Stage-discharge relation defined by current-meter measurements
<br />below 170 fi:J/s (4.8 m3/s) and by slope-area measurement at 585 fi3/s (l6. 6 m3/s).
<br />Maxima. --Sept. 4-18, 1970: Discharge, 585 fi3/s (l6. 6 m3/s) 0430 hours Sept. 6 (gage
<br />height, 2. 80 ft or 0, 853 m).
<br />1968 to August 1970: Discharge, 360 ft3/s (l0. 2 m3/s) May 28, 1969 (gage height,
<br />2.28 ft or 0.695 m), from rating curve extended above 70 ft3/s (2.0 m3/s).
<br />
<br />Gage-height record. ~-Water-stage recorder graph. Datum of gage is 7,052.04 ft
<br />(2, 149. 462 m) above mean sea level.
<br />
<br />Discharge record. --Stage-discharge relation defined by current-meter measurements
<br />below 4,400 ft;j/s (125 m3/s) and by slope-area measurement at 6,580 ft3/s
<br />(l86m3/s).
<br />
<br /> Mean discharge, in cubic feet per second, 1970
<br />Day Discharge Day Discharge Day Discharge
<br />Sept. 4 13 Sept. 9 29 Sept. 14 300
<br /> 5 85 10 21 15 115
<br /> 6 229 11 18 16 80
<br /> 7 74 12 21 17 60
<br /> 8 43 13 231 18 47
<br />
<br />~. --Se~t. 4-18, 1970: Discharge, 6,580 n3/s (186 m3/s) 0700 hours Sept. 6
<br />(gage height, 9.02 ft or 2. 749 m), from rating curve extended above 4,400 ft3/s
<br />(125 m3/s) on basis of slope-area measurement of peak flow. ...
<br />1910 to August 1970: Discharge, about 25,000 it3/s (710 m3/s) Oct. 5, 1911
<br />(gage height, 17.8 ft or 5.43 m, from noodmarks), from velocity-area study;
<br />Maximum stage known, that of Oct. 5, 1911. Flood of June 29, 1927, reached
<br />a stage of 13.5 ft or 4.11 m (discharge, about 16,000 ft3/s or 450'm3/s), from
<br />information by local residents.
<br />
<br />Gage height, in feet, and discharge, in cubic feet per second, at indicated time, 1970
<br />
<br /> Mean discharge, in cubic feet per second, 1970
<br />Day Discharge Day Discharge Day Discharge
<br />Sept. 4 108 Sept. 9 999 Sept. 14 3,170
<br /> 5 928 10 887 15 2,000
<br /> 6 4,100 11 815 16 1,190
<br /> 7 1,560 12 810 17 943
<br /> 8 1,160 13 1,660 18 756
<br />
<br />Hour Gage Discharge Hour Gage Discharge Hour Gage Discharge
<br /> height height height
<br />Sept. 3 Sept. 6"'-Con. Sept. 13*-Con.
<br />2400 0.88 8.7 0400 2.57 404 -0930 1. 85 115
<br />Sept. 4* 0430 2.80 585 1130 2.47 390
<br />1230 ,89 6.9 0530 2.37 280 1230 2.40 355
<br />1600 1.12 13 0630 2.50 349 1300 2.53 465
<br />1730 1.34 24 1000 2.32 245 1500 2.35 390
<br />2100 1.39 28 1300 2.10 161 1530 2.08 245
<br />2400 1.35 25 1800 I. 96 120 1800 2.38 425
<br />Sept. 5* 2400 I. 92 108 2400 2.30 369
<br />0400 1. 29 20 Sept. 7* Sept. 14*
<br />1100 1. 24 18 1200 1. 78 76 0600 2.30 369
<br />1300 1. 42 31 2400 1.65 54 0800 2.53 545
<br />1500 1. 85 102 Sept. 11 1000 2.30 368
<br />1700 2.13 180 2400 1.27 17 1200 2.20 301
<br />2000 2.13 180 Sept. 12* 1230 2.28 343
<br />2200 2.16 191 1500 1. 27 17 1400 2.15 265
<br />2230 2.33 260 1700 1.31 19 1500 2.08 229
<br />2330 2.25 225 2000 1.55 40 2400 1. 91 167
<br />2400 2.29 241 2400 1. 37 23 Sept. 15*
<br />Sept. 6* Sept. 13* 1200 1. 70 110
<br />0130 2.57 404 0200 1. 40 25 2400 1. 64 95
<br />0200 2.37 280 0500 1. 80 88
<br />0330 2.78 569 0700 1. 95 132
<br />
<br />Gage height, in feet, and discharge, in cubic feet per second, at indicated time, 1970
<br />
<br />'" Daily means computed from data 10 addItion to fIgures shown.
<br />
<br />Hour Gage Discharge Hour Gage Discharge Hour Gage Discharge
<br /> height height height
<br />Sept. 3 Sept. 6 Con. Sept. 13* Con.
<br />2400 1. 87 81 0900 8.42 5,720 0900 4.60 1,320
<br />Sept. 4* 1200 7.33 4,270 1200 4.56 1,290
<br />0600 1.86 80 1500 6.63 3,410 1600 5.76 2,430
<br />1200 1.88 83 1800 6.12 2,820 1900 5.68 2,340
<br />1600 2.08 120 2100 5.72 2,380 2000 5.88 2,560
<br />2200 2.22 151 2400 5.43 2,080 2200 5.91 2,590
<br />2400 2.66 281 Sept. 7 2400 5. 58 2,230
<br />Sept. 5* 0700 5.00 1,670 Sept. 14*
<br />0300 2.77 323 1200 4.78 1,470 0200 5.62 2,270
<br />0800 2.61 264 1800 4.65 1,360 0500 6.23 2,940
<br />1200 2.61 264 2400 4.54 1,270 0700 6.30 3,020
<br />1500 3.01 435 Sept. 11 1000 7.10 3,980
<br />1700 3.99 1,010 2400 3.84 770 1200 7.08 3,930
<br />2000 5.53 2,360 Sept. 12* 1800 6.61 3,320
<br />2100 5.95 2,800 1200 3.84 770 2400 6.18 2,800
<br />2300 5. 95 2,800 1700 3.86 782 Sept. 15
<br />2400 6. 33 3,190 2100 4.09 836 0600 5.75 2,300
<br />Sept. 6 2400 4.24 1,040 1200 5.43 1,960
<br />0300 8.00 5,230 Sept. 13* 1800 5.18 1,650
<br />0400 8.08 5,290 0400 4. 11 950 2400 4.98 1,410
<br />0700 9.02 6,580 0700 4.12 957
<br />
<br />*Daily means computed from data In addItion to fIgures shown.
<br />
|