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<br />()Q2223 <br /> <br />~OTAL P~ECIPPA~IO',. l~~CI"'ES <br /> <br /> <br />_.;&uSl H.ll~ <br /> <br />_'t <br /> <br />.,' .. <br /> <br />.. <br />~-.. , . <br /> <br />~'7' <br /> <br />,,-~ <br />" <br /> <br />-'i.. <br /> <br />'';, <br /> <br />.. <br /> <br />("rom Weekly Weather .wd Crop lluUC'lin published by National Weather St>rvice and Department of ~rk:UltuTe.) <br /> <br />" <br /> <br />l.,.,oIA/W.' ,(Il~l "'1N.lll<lol. ';:')><<. hCIl1l1 <br /> <br />....._~-.-- <br /> <br />~ATlO:-;A1. Vo'ATER COSDlHO:-;S <br />Augllll1985 <br />BaM'donreporhfromtheC..anadlan <br />and V.S Field offke~;compJeled <br />&plcmbcr9,198S <br />Thomas G. Ross, Edllol <br />CarroU W. Sabot: <br />Allen SinnoH <br />JohnC.Kammcrcr <br />Krishnal'l'ni V. Sarma <br />5huon A. Edmonds <br />Carole 1. ~hrlo" <br />umc' Fleshman <br />Sharon LPelenon <br />fIances 5. O.n'uon <br />CiHolyn L \lo~ <br />The Nanonal Water Conditions ~ publi._heU month])". Sub- <br />scriptions are frcc on application 10 the l"alional.....altl C.on.1l- <br />lions. U,S. GeolOj::iul Survey, \IS 0119. Reston. VUl!inia 22092. <br /> <br />TfCH!\'ICAL <br />STAFF <br /> <br />COPY <br />PREPARATlO~ <br />GRAPIllCS <br /> <br />EXPLANATIOS OF DATA <br />COlfr mIIp shows lEenefaliled pattelTl of $lreamOo.... for lhe <br />month b~ on 18 irldell; slream1!.~inI: stalions in C.anada and <br />164 inde... JlalionSUllhe l1nll..d Stales. Alaska and Hawaii inset <br />maps silo'" su.-amno", onl)' ill Ih.. indu ~ $laHons Ihat are <br />Iocatedne&f Ihe poinusho"'n by Ihe ano""s_ <br />Slre.mflo.... fOf the ..unent month isrompared ""Ith no.... for <br />Ihe WIle month in lhe 3o-yca:r rderent't' period, 1951-80. <br />Streamflo"" i$ romiderl.'d to be bt'1o.... rhe nO"'lisl range if It is <br />"'llhin th.. tange of the ]0'" flo""s that have oct'Uned 25 percenl <br />of the Ill11e (belo'" Ihe lower quartile) durin~ Ihe reference <br />period. F1"''' i$ ronsidered 10 be ab<H'eth.."orrni1f ronxe ifil is <br />",'ifl'lin Ihe raf1lEe of the high flo.....s thai h.ve occurred H per,ent <br />of the wne labo"e the upper quartile), Shoner refuen"e periods <br />are used for Ihe Pu~no Rico mde!\. staliom be.:au~e of the <br />timiledre.-ordsJ"ailablc <br /> <br />F1o",h411erthanlhelo""crquanilebullo"'erthanthl:upper <br />quartile is described I.' bemg within the "o"'14f rl1"Ke. In Ihe <br />National Water Omdllions, tht median is obuined h~' rankin!! <br />Ihe 30 flows for each month of the reference period in their <br />order of miljl:nitude; the h~heSl flo" is number], the Io"est <br />flo'" is number 30, an-d the a\fC'raJ:e of the 15th and 161h hipleSl <br />flo"', is the median. One-half of the lime you would ell;pecl Ihe <br />flows for the monlh fO be bdo"" the medIan and one-half of the <br />lime 10 be above Ihe median. <br />Flood frequenC'y anaJ}'ses defIne the reM ion of flood peak <br />malEnitude 10 probahilit), of occunence or recurrence inlen'al. <br />Probability of ocC'urrence i$ lhe ch..nce thaI a gi,'en l100d <br />m"tlnitude ",'ill be nceeded in an}' one year. Recurren.~ inltrval <br />is Ihe reciplOcal of probabltit~ of oct'Urrence and is lht al'era!.. <br />nllmber of ytar\ bet"'een occurrences. For eumple. a nood <br />having a pJObability of oct'UlftnCe of 0.01 () perce-nt) has a <br />reuJrrenC't interval of 100 yean. Rtcurrenct inlervals impl)' no <br />rC"!!u!ariIY of occurrence, a l00'~'ear l100d mq.:ht be ell.ttded in <br />conse-cutive )'ean or it m~hl nol be e!\.cet'd...J lf1 a 100.y"1I <br />period, <br />Statements aoollt grcnm,J-..'tl,..r l~~t'lr rder to conditions nur <br />the end of Iht month. The ",attr leye] ITl each keyob)C"f\'alJOn <br />""..U is compand ",-ith aver~e Ityel for the end of the month <br />dttermined (rom the enlue past f~ord for thaI "'eU Of from 3 <br />30-year reference period_ 1951-80. Ousfl#es In K'fJUnd....CIt'r <br />w~e/s. unless described other"''lSe. are !Tom lhe- tnd of the <br />prtvioll' month to Ihe end of the currtnt month. <br />DisilOlyedsoildsand temperarllredalafotAII!!U~t are given (or <br />six $uea.rn-urnplint siles that are 2~ of the Sational SUtam <br />Qualit). AcrountlnlE /IOtl",ork (NASQAN). D~lved solids are <br />minerals dinol~ed in \tiater lnd usually consisl predominantly of <br />silica and ions of ....k;lIm, m"tlnesium, todium, poUS!iIUm, <br />carbonate. bicart>onate. slIlfatt,chlonde. and nltnle. Dlswl~ed. <br />Kllids discharge represtnts the lOW da.il~' amount of diS!iOhedmintrals curted b)- the stnam. Di.uol~d-solids conocntr4ticru <br />are lEtneraU~' higher dUfUl$ periods of 10'" nrtamOo"'. but tht <br />hightst dLSsolved-1oOlid. discharges occur during peno..Js (\( h~h <br />nrcamno'" beC'aUM: the IOlaJ quanti1ies of "'altr. ..nJ therefOl," <br />10t41 load of dissoh~d mmeu.ls. are so mll.h pcatettha:l 3t Ulne <br />of 10'" no..... <br /> <br />11 <br />