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ePHg;ghtid
1. kdpj ghtid + Rfhjhuk; 2. tptrhak; 3. kpd; cw;gj;jp4. Nghf;Ftuj;J5. kPd;gpb6. ifj;njhopy;7. nghOJNghf;F
cyfpd; nkhj;j ePHtsk;
1.36 x 108 kpy;.n`f;.kPw;.
97.2%
cg;G ePH
2.8%
ed;dPH
epy Nky; kl;l ePH
2.2%
epyj;jb ePH
0.6%
MW ciwgd
pgpw
0.01%
2.13
% 0.04%ngwf;$baJ
ngwKbahjJ
0.23% 0.33%
kdpjghtid0.26%
cyf ePH tsk;
Nkw;gug;G ePHePiu• Fbg;gjw;F• cliyr; Rj;jpfupg;gjw;F• tptrhaj;ij Nkw;nfhs;tjw;F• kpd;rhu cw;gj;jpf;F• kfpo;r;rpahd tpisahl;LfSf;FNghd;w gy;NtW nraw;ghLfSf;Fg;
gad;gLj;Jfpd;Nwhk;.
kiotPo;r;rp ejpfs; fpzWfs; eP&w;Wf;fs;Mfpatw;wpypUe;J ePiug;
ngw;Wf;nfhs;Sfpd;Nwhk.;
gpuNjrj;jpw;Fg; gpuNjrk; ePHngwg;gLk; khHf;fq;fs; NtWgLfpd;wd.
,tw;wpid
• kz;zpd; jd;ik• kz;zpd; tif• jiuj;Njhw;w mikg;G Nghd;w fhuzpfs; epHzapf;fpd;wd.
•MWfs; caHe;j Nkw;gug;gpypUe;J jho;e;j gFjpfSf;$lhfr; nrd;W fliyr; nrd;wilahky; ePHj;Njf;fq;fSf;F jpir jpUg;Gtjd; %yk; ePH Nrfupf;fg;gLfpwJ.
•kiotPo;r;rpapdhy; tUk; ePu; ePNue;J gpuNjrq;fis mile;J Fsq;fs;, thtpfspy; Nrfupf;fg;gLfpd;wJ.
,t;thW Nrfupf;fg;gLk; ePH gy;NtW topfspy;
tpuakhfpwJ. 1.ePH ePHj;Njf;fq;fspd; gLf;iffspDhlhf
cl;Gfy;.• ePH epyj;jpw;$lhf cl;GftpLk; jd;ik
Fiwthf ,Ug;gjw;F Fsg;gLf;iffs; fspkz; tPjk; $Ljyhf cs;sitahf ,Uj;jy; Ntz;Lk;.
• kzy; kz; tPjk; $Ljyhf ,Ue;jhy; ePH cl;GftpLk; jd;ikAk; $Ljyhf ,Uf;Fk;.
• kuq;fspd; ,iyfs;, rUFfs; ePHg;gLf;iffspy; gbe;J ePH cl;GftpLk; jd;ikiaf; Fiwf;fpd;wd.
2. Nkw;gug;G ePuhdJ epyNkw;gug;gpw;F
mz;ikapy; ,Ug;gjhy; ePH Mtpahjy;
%yk; $Ljyhf ,of;fg;gLfpwJ.
• nghpa kuq;fspdhy; Fsq;fSf;F epoy; nfhLg;gjd; %yKk;>
• fhw;wpd; <uypg;igf; $l;Ltjd; %yKk;>
Mtpahjypd; msitf; fl;Lg;gLj;jyhk;.
3.ePHkl;l NtWghL fhuzkhf ePHj;Njf;fq;fspypUe;J mizf;fl;bDhlhff; frpe;J (gf;f tbg;G) ntspNaWfpwJ.
• ,jw;F 30-35% fspkz; cs;s kz;iz cgNahfpj;J mizf;fl;Lfis fl;LtJ rpwe;jJ.
• ,t;thW fpilf;fg;ngwhtpbd; mizf;fl;bd; eLg;gFjpf;F fspkz; NrHj;J ,Wf;Ftjd; %yk; ePH frpe;J nry;Yk; msitf; fl;Lg;gLj;jyhk;.
• tTdpah,kd;dhH khtl;lq;fspy; Nkw;gug;G ePH tptrhaj;jpw;Nf $Ljyhfg; ghtpf;fg;gLfpwJ.
• new;gapHr;nra;if ngUk;Nghfk;,rpWNghfk; vd;W ,UKiw nra;ag;gLfpwJ.
• ngupa ePHg;ghrdf; Fsq;fspypUe;Jk; rpwpa ePHg;ghrdf; Fsq;fspypUe;Jk; tha;f;fhy;fspd; %yk; ePHtoq;fg;gLfpwJ.
• ,tw;wpy; mNefkhd jpl;lq;fspy; ePHj;jl;Lg;ghL fhzg;gLfpd;wd.
,tw;wpw;fhd fhuzq;fs;:1.jpwe;j tha;f;fhy;fspDhlhf gapHr;nra;if epyq;fSf;F ePH nrd;wilAk; NghJ Vw;gLk; ePupog;Gfs;2.ePHg;ghrdf;Fsq;fspy; ePUl;GFjy;, mizf;fl;bDhlhf gf;ftbg;G Vw;gly;,ePH Mtpahjy;3.fpUkp ehrpdp, cuk; ghtpg;gjw;F Nkyjpf ePiug; ghtpj;jy;.4.gjpNtl;by; cs;s tp];jPuzj;jpYk; ghu;f;f mjpfsT nra;if gz;zg;gly;.5.ePiur; rpf;fdkhfg; ghtpg;gJ gw;wpa mwpTk; Mu;tKk; Fiwthf ,Uj;jy;.
6. gioa Kiwg;gb tptrha eltbf;iffis Nkw;nfhs;sy;.
7. tptrha cgfuzq;fs;;,ney; tq;fpf;fld; Kjypad tptrhapfSf;F cupa fhyj;jpy; fpilf;fhik.
ePupog;Gfs; Vw;gLk; re;ju;g;gq;fs; Nkw;gug;G
ePUf;F mjpfk; vd;gjhy; fhyNghfj;jpy;,ad;wsT Fiwe;jsT ePiug; ghtpj;J ePiur;Nrkpg;gjd; %yk; $basT rpWNghfk; nra;tjw;F ePHKfhikj;Jt eilKiwfisf;ifahs Ntz;Lk;.
•,jid gapHr; nra;if njhlq;f Kd;dH jpl;lkply; Ntz;Lk;.•,t;thW jpl;lkpLk; NghJ
fpilf;ff; $ba tsq;fs; ePHg;ghrdj; jpl;lq;fspd; nraw;ghLfs; tptrhak; nra;if gz;zg;gLk; fhzpapd; tp];jPuzk; fle;j fhy mDgtq;fs; tptrhapfspd; r%fg; nghUshjhu epiyikfs;
Mfpad fUj;jpw; nfhs;sg;gl Ntz;Lk;.NkYk;•ngUk; Nghfj;ij jpl;lkpl;lgb Fwpj;j fhyj;jpy; Muk;gpj;jy;.•gapH nra; jiuia ,aYkhd tiu rkg;gLj;jy;.•tha;f;fhy;fis Jg;guthf itj;jpUj;jy;.•ePsk; $ba tha;f;fhy;fspy; gapHr;nra;ifia jtpHj;jy;.
• gapupd; ntt;NtW tsHr;rpg; gUtq;fisf; fUj;jpw; nfhz;L mjw;Nfw;g ePiug; gha;r;Rjy;. • rpW Nghfj;jpy; ney; tay;fSf;F mUfhikapy;
cs;s tha;f;fhy;fspypUe;J tUk; frpT ePiug;
gad;gLj;jp rpW jhdpaq;fis cw;gj;jp nra;jy;. • ePHg;ghrd Kfhikj;Jtj;jpy; ePHg;ghrdj; jpizf;fsq;fs;>tptrha jpizf;fsq;fs;> fkj;njhopw; jpizf;fsq;fs; Mfpad gq;fhw;Wfpd;wd.•,it vy;yhtw;iwAk;tpl ePH Kfhikj;Jtj;ijr; rpwg;ghf eilKiwg;gLj;jypy; ngUk; gq;fspg;G tptrhapfisr; NrHe;jJ.
ePHg;ghrd jpl;lnkhd;wpd; gpujhd ghfq;fs;
ePuhdJ fpilf;fg; ngWk; topfs;; :-•kio•Fsq;fs;•Mo;fpzW•eP&w;Wf;fs;
ePHj;Njf;f jpl;lq;fspd; Nehf;fq;fs; :-•ePHg;ghrdk;•FbePH trjp,tPl;Lg; ghtid•kpd;rhu cw;gj;jp•nts;sg; ngUf;iff; fl;Lg;gLj;jy;•ed;dPH kPd;tsHg;G
ePHj;Njf;fq;fSf;F ePuhdJ fpilf;fg;ngWk; topfs;
•kio %yk; Neubahf•kio %yk ePNue;J gpuNjrq;fis te;jilAk; ePH %yk;•MWfSf;F FWf;Nf mizf;fl;ilf; fl;b ePHj;Njf;fq;fSf;F jpir jpUg;Gtjd; %yk;
1.rpwpa ePHg;ghrdj; jpl;lq;fs;: 200 Vf;fH tiu2.eLj;ju ePHg;ghrdj; jpl;lq;fs;: 200-1500 Vf;fH3.ngupa ePHg;ghrdj; jpl;lq;fs;: 1500 Vf;fUf;F Nky;
Fsj;jpd; FWf;Fntl;L Kfk;
1
2
4
3
56
1. Fsj;jpd; Mff;Fiwe;j nfhs;ssT. (DEAD STORAGE)2. ePupid gad;ghl;Lf;F toq;ff;$ba Mff; Fiwe;j kl;lk.; (MINIMUM POOL LEVEL)3. ePupid gad;ghl;Lf;F toq;ff;$ba Mff; $ba kl;lk;.
(MAXIMUM POOI LEVEL)4. toq;fg;glf; $ba ePupd; Mff; $ba nfhs;ssT.
(ACTIVE STORAGE)5. ePupd; Mff; $ba nts;s kl;lk;.
(HFL)6. mizf;fl;bd; cr;rp kl;lk;.
(BTL)
• SLUICE• SPILL
SPILL CREST
SLOPING APRON STILLING BASIN• fhy;tha;fs;
1.gpujhd fhy;tha;fs; (MAIN CANALS)
2.fpisf; fhy;tha;fs; (BRANCH CANALS)
3.gfpUk; fhy;tha;fs; (DISTRIBUTING CANALS)
4.tptrha fhy;tha;fs; (FIELD CANALS)
ePiur; rpwe;j Kiwapy; toq;f ePHg;ghrdf; fl;Lkhdq;fs; (IRRIGATION STRUCTURES) mikf;fg;gLfpd;wd.
• TURN OUT,OFF TAKES
• REGULATORS
• CULVERTS AND DRANAGE UNDER CROSSING
MEASURING DEVICES (msf;Fk; fUtpfs;;)
• PARTIAL FLUME
• BROAD CRESTED WEIR
ePh; Ve;J gpuNjrk;
MW
ePh; nfhs;Sk; gpuNjrk;
ePHg;gha;r;rw;
gpuNjrk;
ePh;g;ghrd tha;f;fhy;;
Rw;whly; khriljYk; ePHg;ghrdj; jpl;lq;fSk;
01. jpl;lj;jpd; ePNue;J gpuNjrk;a. ePNue;J gpuNjrj;jpy; rpWrpW jpl;lq;fis
ePHg;ghrdj; jpizf;fsj;jpd; mDkjpapd;wp eilKiwg;gLj;jy;. b. ePNue;J gpuNjrj;jpy; Nrid kw;Wk;
gapHr;nra;iffis mjpfupj;jYk; fhLfis mopj;jYk;.
02. Fsj;jpd; ePHgpbf;Fk; gpuNjrk;
a. ePHgpbf;Fk; gpuNjrj;jpy; Kaw;rpfis Nkw;nfhs;Sjy;
b. Fsj;Jf;nfd xJf;fg;gl;l xJf;fPl;L epyj;jpy; Kaw;rpfs; Nkw;nfhs;Sjy;.
03. ePHtoq;fYk; kw;Wk; tbfhy; tha;f;fhy;fSk;
a. ePHtoq;fy; tha;f;fhy;fspd; xJf;fPl;Lg; gpuNjrj;jpy; gapH
nra;jy;.
b. tbfhy;tha;f;fhy;is eputp mtw;wpy; gapH nra;jy;.
04. Fsj;jpy; gad; ngWk; fhzpfs;
a. xJf;fPl;L kw;Wk; Nkl;L epyj;jpy; gapHnra;jy;.
b. xJf;fPl;L kw;Wk; jho; Nkl;L epyq;fl;F jw;fhypf mDkjpg;gj;jpuk; toq;Fjy;.
05. ,tw;iwj; jPHg;gjw;fhd MNyhridfs;.a. ePNue;J gpuNjrq;fspy; Kaw;rpfisf; fl;Lg;gLj;jy;> Gjpa ePHg;ghrdj; jpl;lq;fisNah> gioa ePHg;ghrdj; jpl;lq;fis tpupTgLj;jiyNah ,g;gFjpapy; jLj;jy;.
b. ePH gpbf;Fk; gpuNjrq;fspy; Kaw;rpfis fl;Lg;gLj;jy;.
c. xJf;fPl;L epyq;fis gpwH cupik nfhz;lhLjiyNah> my;yJ cj;juTg;gj;jpuk; toq;FjiyNah jLj;jy;.
d. ,tw;wpy; <LgLk; tptrhapfspy; eltbf;if vLj;jy;.
e. jpl;lq;fspy; jw;fhypf mDkjpg;gj;jpuk; toq;FKd; ePHg;ghrdg; nghwpapayhsupd; rk;kjj;ijg; ngwy;.
f. vy;yhtw;wpw;Fk; Nkyhf ntspf;fs cj;jpNahfj;jHfs; mur epyq;fis tptrhapfs; ifafg;gLj;j ,lk;nfhlhJ tpopg;ghf ,Uj;jy;.
ePHg;ghrdj;jpl;lk;(1)rpwpa ePHg;ghrdj;jpl;lk; < 200 ACS(2)ngupa ePHg;ghrdj;jpl;lk; > 200 ACS
(a) PROVINCIAL SCHEME(b) INTER PROVINCIAL SCHEME
(a) PROVINCIAL COUNCIL(b) CENTRAL GOVERNMENT
ngupa ePHg;ghrdj; jpl;lk;
1] eLj;ju (Medium) 2] ngupa (Major) 200 1500 Vf;fH 1500 Vf;fupw;F Nky;
Fwpg;G :- 1990 ,y; mikr;rH fhkpdp jprhehaf;fhtpd; jdpg;gl;l rpghuprpy;
1000Vf;fupw;F Fiwe;j vy;yhj;jpl;lq;fSk; khfhzrigf;Ff;
ifaspf;fg;gl;lJ ,J gpw;fhyj;jpy; kPsg;ngwg;gl;lJ.
1856 – PADY LAND IRRIGATION ORDINANCE (a) RULES(b) GAN SABBAS –OFFICERS & FARMER
REPRESENTATIVE(c) VEL VIDANE
1876 – VILLAGE COUNCIL
1887 – FORMATION OF P.W.D
1900 – FORMATION OF ID
1956 – IRRIGATION ORDINANCE
1958 – PADY LAND ACT(1) SECURITY TO TENNENT CULTIVATION(2) ESTABILISHMENT OF CULTIVATION COMMITTEE (NO VEL VIDANE SYSTEM)
DIRECT IMPACT ON ALL MAJOR IRRIGATION SCHEMESAND LAND SETTLEMENT SCHEMES. BOTH IRRIGATION ORDINANCE AND PADY LAND ACT CONTRADICT IN MAIN ASPECTS.
1968 – IRRIGATION ORDINANCEPOWER TO CULTIVATION COMMITTEE
1970 – AGRICULTURAL MODIFICATION LAW BY THIS CULTIVATIONCOMMITTEE GET THE POWER THIS CONTRADICT 1968 IRRIGATION ORDINANCE.
1979 – AGRARTION SERVICE ACT ABOLISHMEN OF PRODUCTION COMMITTEE AND
FORMATION OF CULTIVATION COMMITTEEPOST OF CULTIVATION OFFICER
1988 –
1988 – AGRARIAN SERVICE AMMENDMENT ACTFARMER ORGANISATION
1994 – AMMENDED IRRIGATION ORDINANCE.
HIGHLIGHTS OF IRRIGATION AMENDMENTS OF JUNE 1994
1.SUBSTITUTION FOR “CULTIVATION COMMITTEE” THE EXPRESSION OF “FARMERS ORGANIZATION”
2.THE EXEMPTION OF PAYMENT ON IRRIGATION RATE IN RESPECT OF INTER PROVINCIAL IRRIGATION SCHEMES.
WHERE FO’S HAS TAKEN OVER THE O & M OF WHOLE OR PART OF DISTRIBUTORY
CANALS
3.FO’S THAT HAS TAKEN OVER O & M OF “D” CANALS CAN IMPOSE AND RECOVER A LEVY.
4. PROVIDES FOR ESTABLISHMENT OF PROJECT MANAGEMENT COMMITTEES AND SUB PROJECT MANAGEMENT COMMITTEES.
5. FO COMPOSITION IN P M C SHOULD BE NOT LESS THAN FIFTY PER CENT OF TOTAL MEMBERSHIP THE OFFICALS WILL BE REPRESENTATIVE FROM.
- D I- L C- D A S- D AGRICULTURE- C – OF CO- OPERATIVE DEVELOPMENT- D I V SECS- ANY OTHERS
6. P M SHOULD BE APPOINTED BY THE SECRETARY IN CHARGE OF THE SUBJECT OF IRRIGATION.
7. P M C CAN HOLD PRE CULTIVATION MEETING AND MAKE RECOMMENDATION TO DIV SECS. THE MEETING OF P M C SUMMONED BY DIV SECS NOW CALLED “CULTIVATION MEETINGS” AND TAKE DECESIONS PROVIDED TWO THIRD OF FO REPS IN PMC ARE PRESENT
ePHts Kfhikj;Jtk; (S.W)1. ePH Ve;J gFjp Kfhik. (MWfs; mlq;fyhf)2. jpl;l Kfhik.3. ghrdg; gFjp Kfhik.
1
* Reservoir *
** Electric power ***** Navigation
***Divertion
Dam
Side Flow
Irrigation
Divertion Navigat
ionDomestric water
supplySalinity control
(To prevent solt water intretion)
SRILANKA
Area – 25,332 Sq m
Land 24,997
Inland water 335
RAM FALL
Dry zone90” - 200”
South WestSouth Center
Wet zone30” - 60”
North WestNorth EastSouth East
jpl;l Kfhik1.Fixing Priority2.Operation of system
ghrd Kfhikj;Jtk;
1.Water Management2.Land consolidation
Land consolidation will be the ultimate out come of the proper water resource . In respect of Irrigation sector
ePH jpdk; ??
ePH01. vy;NyhUf;Fk; ePH02. xU Flk; ePupd; tpiy?03. ePH tpuaj;ijj; jLj;jy;04. ePH guhkupg;gpy; $l;L Kaw;rp05. gpw; re;jjpapdHf;Fk; ePH
ePH ts Kfhikj;Jtk;
,Ug;G
ghtid guhkupg;G
ePH1. mwpKfk;
2. Nkw;gug;G ePHi. mikTii. ePHg;ghrdj; jpl;lq;fSk; ePH tpuaKk;
fl;Lg;gLj;jYk;.iii. ePh;g;ghrdj;jpl;lj;jpd; gpujhd ghfq;fs;iv. ePHg;ghrdj; jpl;lq;fSk; Rw;whly; khRglYk;.v. ,yq;ifapy; ePHg;ghrdr; rl;lq;fs;.
3. epyj;jb ePHi. ,yq;ifapy; epyj;jb ePupd; ngWif.ii. epyj;jb ePupd; cUthf;fKk; guk;gYk;.iii. epyj;jb ePupd; ,af;fk;.iv. epyj;jb ePupd; ghtid vy;iy.v. epyj;jb ePupd; juhjuk;.
4. Mw;Wg;gLf;iffSk; ePupd; gad;ghLk;i. mUtp MWii. Nkhjiu MW
cyf ePH jpdk;22.03.2002
fUj;juq;FePHg;ghrdj;
jpizf;fsk;tTdpah.
ePHtsk;1. epyj;jb ePHtsk;2. epy Nky; ePHtsk;
1.epyj;jb ePHtsk;1. epyj;jpd; jd;ik2. ePHg;ghtid tpfpjk;3. kPs; cl;nrYj;Jk; msT4. nraw;if Kiwahy; Nrkpj;jy;
LIMITATION OF USAGE OF GROUND WATER
1.SALT WATER INVESTIGATION2.LOWERING W.T
SOLUTION
1.SAFE EXTRACTION
2.ARTIFICIAL RECHARGE(1). INJECTION(2). TEMPORARY FLOODING(3). IMPROVING IN CRITICAL HIGH
PERMEABLE LOCATION
SRILANKA1. NORTH WESTERN AND NORTHERN LIME STONE BELT
DEPEND SOLELY ON G.W2. DRY LOW LAND ZONE
(VAVUNIYA,ANURADHAPURA,POLONNARUWA)IRRIGATION DEVELOPMENT…………………
OCT –JAN SURFACE WATER(S.W)REST GROUND WATER(G.W)
3. COSTAL BELTBOTH GROUND WATER & SURFACE WATER
4. WET ZONEMAINLY SURFACE WATER
GROUND WATER FORMATIONBED ROCK AQVITON1.IGNAOUS ROCK(jPg;ghiw) HARDLY POROUS LESS
WATER HOLDINGWATER HELD IN FA…….
2. METAMOPHIC(cUkhwpa ghiw)HARDLY POROUS LESSWATER HOLDINGWATER HELD IN FA…….
3.SEDIMENTORY (milaw; ghiw)WHETHERING AND EROTION
SAND STONE
LIME STONE
DUE TO POROUS NATURE HELD,WATER
DUE TO CALCIUM CARBONATE SOLUTION IN CARBONIC ACIDSOLUTION CANALCARVERNSHIGH YIELD OF GROUND WATER
QUALITY OF GROUND WATER1.ctHj;jd;ik (BRACKISHNESS)2.fbdj;jd;ik (HARDNESS)
<150PPM GOOD POTABLE WATER(PARTS PER MILLION)1500> >150MANAGABIC FOR DOMESTRIC USE
SEA WATER 20,000 24,000 PPM
TESTADD SILVER NITRATE
<100 PPM SOFT WATER> 300 PPM HARD WATER> 1000 PPM PROHIBITEDFOR USE
REMOVAL BY HEATING CONVERSION OF INSOLUABLE SALTS AS
SEDIMENTS
1
2
epyj;jb ePHj;jhq;fp OSAKA CITY(UNDER GROUND DAM)
fly;
BED ROCK
F.R
G.W
DEPTH > 60m NOTE: F.B > 10mTO PREVENT WATER LOGGISTCROSS SECTION
90 Cm
55Cm
GROUND WATER TERMINOLOGY 1.WATER SHED / BASIN2.PRECIPITATION3.SURFACE FLOW4.RUN OFF5.INTERCEPTION6.TRANSPIRATION7.EVAPOTRANS PIRATION8.PERCULATION9.INFILTRATION10.AQUIFER11.GROUND WATER
(1) G.W(2) D.G.W
12.WATER TABLE13.GROUND WATER CONTOUR
ePH tPo;gbT/kioflj;jg;gLk; Mtpahfp ePH
EVAPOTRANSPRATION
MtpahFk; ePh;
fly;
ePH Njf;fq;fs;/fhy;tha;fs;
ePH Njf;fq;fs;
gf;ftbg;G ePHSEEPAGE
,wq;F ePHPERCOLATION
cl;GFk; ePHINFILTRATION
epyj;jbapy; cs;s ePHGROUND WATER FLOW
ePhpay; tl;lk;
cg;G ePH
1 2a3
4 MSL
GWLFWZ
BWZ
b
5
c
Fig: GROUND WATER CONDITIONS IN THE JAFFNA PENINSULA (AFTER C.H.I STRIMANNE,1952)
(a)Red Earth,(b)Jaffna lime stone,(c)Granite gneiss,(MSL)Mean sea level,(GWL)Ground water level,(FWZ)Zone of fresh water saturation,(BWZ)Probable zone of brackish water:(1)Dry well,(2)Well of puttur type,(3)Ordinary successful well,(4)Spring of keerimalai type,(5)Solution cavern
A RAINY SEASON
SALT WATER
FRESH WATERM.S.L
BED ROCK
B DRY SEASON
M.S.LFW
BWSW
BED ROCK
Fig Groundwater conditions in coastal sands.1. Fresh water well, 2. brackishwater well, BW, brackishwater zone
1
2
1
2
DRY ZONE
WET ZONE
INTERMIDIATE ZONE
• COLOMBO
• JAFFNA
• TRINCOMALEE
• BATTICALOA
• ANURADHAPURA
• NUWARAELIYA
• KANDY
• MATARA
• PUTTALAM
• HAMBANTOTA
• RATNAPURA
1
2
3
1. 30” – 60”
2. 60” – 90”
3. 90” – 200”
epyk; - 24>997ePH - 335 (Sq Mile)
MIOCENE LIME STONE
VIJAYAN COMPLEY(MATOMOPHRS)
HIGH LAND SERIS (IGNASIOUS)
Miocene lime stoneJurassic(Gondwana)Vijayan complex
High land series
•
Galle
Colombo •
•
•
Mannar
Puttalam
Jaffna
Batticaloa
Trincomalee
Vavuniya
AnuradhapuraTabbowa
Kandy
Badulla
•
•
•
•
•
•
•
Fig: Sketch map of geology of Sri Lanka
Recharge areaWater table
Piezometric surface
Ground surface
Flowing wellWater table well
Artesian well
Water table
Unconfined aquifer
Confining stratum
Confined aquifer
Impermeable state
mizf;fl;LRIP RAP
HFLFSL
xU tifahd xU rPuhd kz; (Homogenious soil)
FILTER
RIPRAP
TRANSTION FILTER
ePUl;Gftplf; $ba gFjp
ePUl;Gf tplh eLg;gFjp (IMPERVIOUS CORE)
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