l he 11um11ge111e11! ot C/!1111110'1 pool resources (CI' !is) me/I asjorest. fishery, grazing land an.I irrigutir111 walc·r can be sustainublc iftttcrc an: 1{001/ i11s111111i1111s involved in the mmwxemen/ / 1r01'c>\ \ 01 grtt\'' runt levct In r11hlir ion f, > 1 lu1 {'\'isl enr~ of u111>ro11riaf (! tc>r/111r>lngy <1111/ prir:« Some scholars argued that there should be gow.m1mem tnterterence in the nunutgemen; o.f such resources (J.\' ihere 111uJ' /}e market [allure and extenuuiii«: 111hen using these resources. :\.'(}\~ adavs. however, nnnutgcntcut ofsuch t'i'.\'OIO'L't:'S has been decentralized Irtnn 1~111.1 1•11r1u1.,e <~/ this ,\{1tc1'.1: l,, l<I <.'.\,\t-',\',\ tlu: /t11.·fo1·s 11•/1ich c~/l'i!ct 1/1e gt•vern<111ce ·~I fonn« 111m111.~u/ small scale 1rrii:a1io11 systems 111 .'1111/wra region 111 genera! anti 111 Ltabru woreda ·o parti, ,,,•,11· It .,/,,o ''""·''<'·''''''" t/u1;'J<1:/<11·111<111,·e u,/ .~11\·rruin:< these irr(~<uio11 system». In atl<lith:1t 111 1/11.1 it tests '"'' ap11i1< obtltt» v.f Ostrum '.1· cie.<(~11 pri11rip/,'.1. Tiiis 1t11dy draw» 1111 ~~ n•l'lew111.~ th« lsterutvre 11{ Ostrom '.1· design princlttles. /11 order 10 acbtvv« 1111.1 vhje1·111e. primc11;1 do111 11·~rr ,:11/!i;cNcl [nnn 11!1: users 1~((0~· rrri1<t1lia11 . ..,:rsrerns r;1 Ilabr» «ore-lo t~/ 1Pl11'c/1 tw« are modern anc! rite rC!111a/,1111x /Ht> a« sraduioual irrtgution .~1st1'ms. i/11! data were extractcd fromjour tocus group discuscton« 111111 I '!II i11diw,!11al respondents. /11 addition lu this, 1/iey ,,.,.,.,. ulsu cuiicctcdfront k1·,1· i11fm·111a•11 irnerviews .f.11icl ob$1'1'•·1111011 111/fl soaondury sM11·1:1•.v. The: data ca'tecusd 11·1:re c111uli1wh'el•. s1111111u1r1wd. unolvsed 1111d th« /11//1111 ing.fi111li111!,~· ore ublt1i1wtl. Th« (i11dl11x indtrutes that Iha loco! OrR(111iza1/um are Rood However. there 111'1' extet nal fucun» tho! i11hihi11/11.1rl! collectlve 11rliu11 i11 bolh :he 11111dem and tradition irrigutitn: sr.>111111 •. Regurcli11g 1/1L lr pt.1:/or1111111C'(! the modem irriJ!.uli1111.~ys1.:111.1 are in11~1· //u1111'1" tradiuuno! irngatio), systvm». (),1r11111.1· desi.~11 principles are applirnb!e ir. bmh n.oiIcrn 1111d trodi1i111111/ lrngution l',l'\ff1n~· ABSTRACT ' • J' g111vr11111,·111.1· 111 npp1 opriaun» of loco! levc I. its ~11~clln·11~ss is based v111t1~ capacit» of !Ii~ lol al c 01n111u1rif,)I /or 1 /•e ir c oltect ii''' a, ·r ion I !ti II'~ rer, t l:e /'act<1rs r hat hill iat, · or ,1t\·,·,> urc1i~1· tln: CC11J1n11nl.',l' [or colte, tlve 11cun11 are l.'01 properly rcalacd K11y words· <.:0111111011 pool resources, manogetuen; 111s1i1111/011, irrigation, collecuvc action