WSP10396 - Laserfiche WebLink

Home Browse Search

i.l 'j iJ '" " " GENERAL EFFECTS OF DROUGHT ON VVATER RESOURCES Bi9 TABLg 2.-Streamflow variability index, in logarithmic units, for sel('cted gaging station8 in the Southwest 33 53 31 " > 20 62 59 30 57 " 35 32 " 61 61 54 56 01 1 5 72 70 60 '" " 37 66 3 " 39 41 40 " 67 47 49 46 77 34 43 " 20 18 26 24 80 " 42 " 25 38 21 85 . " 76 73 13 74 '" 48 68 83 78 81 2 82 71 14 12 15 l! " 10 75 17 9 28 7 16 35 22 77 6 8 Gaging station No. on fig. 4 Name Patia River at Lees Ferry, Ariz.________nn______n__n San Pedro Hiver at Charleston, Arb~_ _ _._______.n._n._ Virgin River at Virgin, Utah__n________nn_nn_..__n Animas River at Durango, 0010.________________________ Beaver RIver neur Beaver, Utah____nnnnn_ _____~__ Conejas River near Mogotc, 0010________________________ Rio Grande near Del Norte, 0010________________________ Sevier Hiver a.t Kingston, Utah_____nnn_nn__n_nn Los Plnos Hiver Ileaf Hayfield, Oolou_u________________ Sagl!a<,he Creek Ileal' Saguache, Colo____________________ Bright Angel Creek near Grand Canyon, Ariz____________ North Fork Virgin River near Bpringdale, Utah_________ Red River neilI' Questa, N. Mex____h___________________ Navajo River at Edith, Colo____________________________ Trinchera Creek above 'rumers Haneh, n('ur Fort Oar- hUHI, Colo__ _____ _ ___ ___________ an.__ _u___ __ ____ ____ Dolores River at Dolores, CO]O___u__n_________________ Florida TIber llear Durango, Colo_________n____________ Bonoita Crook nllar Pata!(onia, Ariz_______nn___________ Kings River at Piedra, CaliL_____n__n________________ Kern HiveI' near Kernvllle, CaliL_____________________n Pe(~os River near Puerto de LIDIa, N. Mex-_____________ Pecos River near Pecos, N. M(>x___n____nn____n_n___ San Juan River at Rosa, N. Mcx-_____________n_~n__n Rio Chama at Parl: View, N. Mex___________n____nn_ Oila Hiv(>r near Gila, N. Mex___________n_n____n__n_ Verde River below Bartlett Dam, Ariz__________________ HiD Grande at Otowi Brid!,e, near San Ildefonso, N. Mex_ Knweah River near Three Rivers, CaUL__n_n_nn__n S!mtn Cruz River at Cundiyo, N. Mex________n___n___ Chevelon Fork near \Vinslow, Ariz_____n_______n_n___ Salt River near Chrysotlle, Arlz______________n_________ Salt River at Roosevelt, Ariz_ u_ ____ ___n___________ Gila HiveI' near Hed Rock, N. MCL_____n_____________ Hayado Creek at SaubJcRaneh,llear Cimarron, N. MeL_ Mimbres River near Mlmbrcs, N. Mex___~_n___________ Gila River at Kelvin, Ariz________~_________ ______n___ Gila River near Solomon, Arizuu_n____n__________n__ Devils Hivernenr Del Rio, Tex.___+___n___nn__n____ Mucnkopi Wash near Cameron, Ariz_____nn_n___~_n Sail Francisco River near Olenwood, N. Mex_______n___ Santa Cruz River near Noga]es/ Ariz______n____n____n J,ytle Creek nMr Fontana, CuI1L__~__n____~__n______n San Antonio Creek near Claremont, CaliL_________n___ Santa Ana River near Mentone, CaIlL_________n____n_ East 1'win Creek nellr Arrowhead Springs, CaIlL_______ Brar.os Rivcrat Waco, Tex________________n____nnn__ Waterman Canyon Creek near Arrowhe[\'1 Springs, CrtllL~ ___________.__nn_'___nn______n_nn___ ___ Little Colorado River at Woodruff, Ariz___nn___n=n_= Cucall(on~a Creek near UvJand, CaliL________nn___n_ City Creek near Highland, CaIiL___n____n________n__ Clear Creek near Winslow, Ariz________n____~__________ Cajon Creek near Kecnbrook, CaIiLnn_n______________ Guadulupc River near Spring Branch, Tex_n__n_n____ 'rule River near Porterville, CaliL__________n__________ Nueces HiveI' at Laguna, Tex_______n______n__nn____ Sun Saba River at Menardl..'l'ex__nn______nn_________ Brazos HiveI' at Seymour, '1"ex__u_~_~nnn___h____n__ Big Rock Creek llenr Valyermo, CaliL ____n_n__+__n__ Colorado niv~r at Ballinger, 'l'exh_n_n___nnn_______ Hillito Crceknear Tucson, Ariz__.________n_~nn______ San Carlos RlvPl' lll'ar Peridot..!.Arizn~n-,--------nn-- Mora HiveI' near Shoemaker, N. Mex___________nhnn Little HiveI' at Cam('ron, 'l'ex.~___n_n____n_n______~" HanD Hivernenr Junction, Tex~__n_n_n_n______n___ North Bosque HiveI' near Clifton, Tex_un________n____ Arroyo Seen near Soledad, CaliL ____nn__~"_~_n___n__ Leon River nOar Belton, Tex__n__n+__u_n_____nnn_ Oallinas River at M(mtezumn, N. Mexh_nnn_n___h_ San Gabriel River Ileal' Azusn, Cn1iLn___nn~nn___h_ Santa Anita Creek near Sierra. Madre, CaIiL______n__n Fish Creek near Duarte, CaIlLnn___nn~__n.__hn___ Arroyo Soca near Pasadena, C31iLu_n_n___n._~___n__ Lampasas River at Youngsport, Tex______________n..+~ Santa Paula Creek near Santa Paula, CaIiL_n_nnn~n Middle Coneho HiveI' near Tankersly, Texn_h_________ San Jose Creek near Whittier, Callf.~__n__n___~~nn__ Piru Creek near Plm, Califn_,_______~.,n______nn____ Santa YsaiJel Creek at Sutherland Dam (Mesa Grande), CuliL _ _~n_____~_~_______n___ ______~_"~________~__~__ Cuyama River near Santa Maria, CullL____~~~________. Rogers Creok near Azusa, CaJiL_n__"__~_____~_~~nn___' TIm Williams River at Planet, Ariz~u_n__nn__~nnn_ West Fork Mojave River near Hesperia, CaliL____n_n_ IMurrleta Creek at Temeeula, CaIlL_n_n__n_n_nn_~_ luasnn River near Santa Maria, CaIlLnn_nn___n_n_ Santa Ynez River above Gibraltar Dam, near Santa Barbara, CallL~~___n._____~____n__________..___~____ Variability index 1930-531904--53 - 0.131 ---0:2 .137 08 .150 .1 65 .157 .1 52 .158 .1 29 .159 .1 50 .161 .1 52 .162 .1 88 .164 ____n_ .165 ~------ .174 ------ .178 n_n__ .184 n_____ .185 -~----- .186 _H__~_ .198 n___n .201 __n___ .204 _n____ 0 .206 .21 .206 .211 .2 08 .216 __n___ .217 .1 97 .219 ------- .222 ------- S .230 .24 .232 .22 8 .232 .22 5 .238 ------- .245 ___n_~ .256 --_.--~ 9 .257 .27 .259 .26 . .259 _n__n .270 -,~---- .270 ___n__ .271 ------- .271 n_n__ .273 n_____ .273 _n_n_ .278 _n____ .280 ____n_ .290 ------- 7 .294 .30 .298 ------- .302 .30 .303 ~_~n__ .314 _"nn~ .315 nnn_ .317 __n___ .320 ___nn .320 ~_.._-- .337 ~~n:3i 7 .339 .344 ------- .345 n___n .350 n_~n_ .361 _____n i .361 .34 .364 n___n .366 n_nn .369 _~_~h~ .373 nnn_ .374 n_____ .377 ~__nn 4 .383 .37 .391 _h_~~h .394 ..1 9 .396 .38 2 .414 nn_n_ .432 nn__n .453 .45 9 .455 n______ .460 n_n_n .466 n_n___ .478 -------~ .491 ____u__ .499 .46 . .509 ___n_n .538 -------- .543 -------- .548 nn_n_ .638 n___~__ .739 __n_~__ .869 .770 puted by use of the median and variability index based on the records for 1904-53. There remain 60 stations having shorter records be. ginning between 1905 and 1930. For these stations the yearly runoff in logarithmic standard-deviation units was computed by use of the median and variability in- dex based on the records for 1930-53, as this was the longest period for which all 60 stations had concurrent record, The median and variability index, and consequently the runoff expressed in logarithmic standard-deviation units, vary somewhat depending on the period of record on which they were based. Ideally, the runoff in loga- rithmic standard-deviation units of all 85 stations should have been computed by use of the median and variability index based on the same period, 1904-53, but the lack of sufficient records for the 60 short-term stations made such procedure impossible. The com- puted runoff of the short-term stations was, therefore, adjusted to make it comparable to that of the long-term stations. An adjustment in logarithmic standard-deviation units was derived for each of the long-term (50-year) stations, This adjustment is the average difference be- tween two sets of values of yearly runoff expressed in logarithmic standard-deviation units; one set com- puted from the median and variability index based on the period 1904-53 and another set based on the period 1930-53. (See table 2.) The adjustment was applied to short-term stations in the same hydrologic region as the long-term station. When several long-term sta- tions existed within the same hydrologic region, the average of the adjustments was applied. ''\Then no long- term station existed within a hydrologic region, the adjustment of a nearby long-term station was used, Table 4 shows the adjustment computed from the rec- ords of each long-term stat.ion and the amount by which the yearly runoff in logarithmic st.andard-deviation units of t.he short.-term st.ations within a hydrologic reg-ion was adjusted. The deviation of the logarithm of each year's runoff from the logarithm of the median (t.hat is, from the meal! of the logarithms of yearly runoff) was then com- puted for each st.ation, and this deviation was divided by the stream's variability index. The resulting figures express yearly runoff in terms of logarit.hmic standard- deviation units and are given in table 3, The runoff in t.hese units was comput.ed on the basis of the 1904-53 record for those stations having record, actual or est.i- mated, for the 50.year period, For those stations hav- ing a shorter record, the runoff was computed on the basis of their 1930-53 record, but the values were ad- justed to the 1904-53 base period as explained in table 4.