m days (as ll doc), ls Ilkely In produce svvcm loal sending, and mu Inc rnllsl bl- kL-p‘ well ln mlrld when salllmrms are llxelnd ur bulk ms flaxhflood law bxvnws rrllreal wnen smlemenls are WV" ln wadls, on are upalleam slde ol reslrleled gaps ln nllls, or ln nullaws near dl-y waeelenulses ll we are an slum pr use the lnlerlse, sudden and min-gum! lalls in deserve, we need nyerslre ellarlnels, drdms, lnllllra. 'rm, and dlyerslon syslems lll ellpe with snen hlgh enslly swans ln Anslmlla, saw lly rainfall runs on or ls elapul-nled [mm land and waler surlan's ouler nln deserls would have similar losses, wlln only m ul relnlnll avallable m plants Nonml esllmales are 0! ml wdrnr mull lnr luresled rreus. 207a lur nunelolesled seeds wl|h nudy ur lrlahle sulls, and up lu m lor me {are eumeled, mmpaclcd, ur day~5eliled bare slles These lew figun-S enable us In make edusaled guesses as lu lne ydlumn ul runelll warn and llenee lnr eapaeny needed in ellannels 0v lluud by~pa§us m any and area, or“: ealllrulle flood levels in valleys sllme pmipxuriun lnlerlsny lrsnles lmlnm hmlfl) are llsled m Table m. G en snrn dnlly- rdmlall lnlenslll ,th ale lne rypleal pmpllrllllns lpereennsgesl ul mum“ we can erpeel [mm l-arllllls sllbslmlasv ll ls (kw pereenlalee ul runeull lllal WI“ deeldl- rne prupulllun M rlrlrages needed ln . d mas (as sull ur swalr sllarage, plls, dams, ur elslernsl We pnsumr d ralny perleld m m null/day, 59¢sz]: m mm dala relers re and landsl As well as snrluee nmdlhm’ls, ulller Vaflnrs alleel Water runarll. 50m lrrlpllrlanl dl-lermlnunls are - CATCHMENY 5le small mKhml'MS dlsrhirge a grakr peak lluud now lllan hrgc ealellnlrnls Fmflull areas will peak lu floods mule rapidly man plams . STREAM GRADIENT. Sleep slleanls dlsrllarge mun: rapldly lllarl duwnslleam 1m; nl gem]: grade ml This ls relaxed ls llle lame above, as llle smaller neadwaler sneams are, ln [lit usually sleeper man we larger slrearlls ln rlle plalns, wluell are onen sande cloggzd and llaye wlde llmd plains . 5le or slow Large slums rnaly lually wn a small ealellmenl, eauslnr l/xal floods, whmu ale same slurrn will llave lime duwnsneam elleel || ls slam-nun, ln desens ur and anus, la see a llpud dlsappulr a lew kllumelres [mm m neadwalels lx-crpl in (M use or vuy wldesplead rams. - STORAGE AND RETARDATION usle Dams, relenllorl pr lnleleepllun lrsnlls, swules, nalnral swamps, and eruled swamps all .ednee ur dzhy flood peak Laul soll appeal-pm ls much more elllelenr in small slreams a! my. denslly, lull large mellmenls naye gleam dampenlnr upldly [or lluods, pluwdlng such leraldarlon areas ale preserved ml suen purposes as flood comm! lmany cl lnese areas are dlamed, filled. urulllll upon) - CMCHMEN‘I mm. The normal dendnur lute lllael drainage panerns lax rivers, where prarlenes pill ll small angles, are supyeel nl lasler flooding lgrealsr shnmnning) lllsn lelld-ulannmln or null—area gnd uldamenls Wld‘ lllelr abrupx (unu, ennsumed vilkys, and relanyely lungruni nlnuddle-ardel suearns . DRA|NAGE DENSITY mle actual kngm nl mm per squm llllurnme) Very dense “landfill: lame watu vuy elllclenlly, and ereale lllyler and lasler "and peaks sneer lluw aeruss rlle llal inluvfluves lsr on slopes ln luwedenslly areas relalds noodewalers, as dues lne bnldcd and bmad screams ol lla- duel areas. . VEGEYATION Kunvfl Inmasl'é as vegelalrlln ls eleared the less (mwn lnlereepllun, llnnlus slurage, and glmmd lrllerlelenee emullnlered by l-alru llle male water runs wif ll lllssoek grass wplxs sluulss ml dry HllfllIE 11.34 SNJ m uunswe wnta wan-l lmn mm mm m w saw. an m null. and mum“ should be med dase lrr mun ln m um lean-us oi amid [ans Feesn wares mMT-x Huv fl ,yn 1am Dwflifls we a»... 343