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Ground Water Prospects L E G E N D GROUND WATER PROSPECTS MAP DEPTH TO RECHARGE RECHARGE MAP UNIT GEOLOGICAL SEQUENCE / GEOMORPHIC G R O U N D W A T E R P R O S P E C T S CONDITIONS STRUCTURES ( PREPARED FROM SATELLITE IMAGE INTERPRETATION WITH LIMITED FIELD CHECKS ) ROCK TYPE UNIT / LANDFORM WATER LEVEL R E M A R K S ( HYDROGEOMORPHIC BASED ON SUITABLE & ( PROBLEMS / LIMITATIONS ) UNIT ) TYPE OF WELLS HOMOGENEITY PRE / POST- MONSOON AVAILABILITY AQUIFER MATERIAL DEPTH RANGE YIELD RANGE QUALITY OF PRIORITY IN THE UNIT GROUND REPRESENTED IN (AVERAGE IN METERS) OF WATER SUITABLE OF WELLS WATER OF WELLS WATER PT = PERCOLATION TANK THE MAP WITH & SUCCESS ( SUGGESTED ) POTABLE (P) IRRIGATED CD = CHECK DAM ALPHANUMERIC CODE ( EXPECTED ) RATE OF WELLS ( RAINFALL & OTHER NON - POTABLE (NP) AREA NB = NALA BUND NO. OF WELLS LS = LOOSE SEDIMENTS DW = DUG WELL 3 ( PROBABILITY ) RW = RECHARGE WELL ( REPRESENTED IN ( REPRESENTED IN SOURCES ) PR = PERMEABLE ROCK MIN - MAX ( in LPM or m / day) DT OBSERVED RW = RING WELL ( INDICATE REASONS IF = DESILTING OF TANK FIR = FISSURED ROCK ( APPROX . RANGE ( COLOUR INDICATES THE MAP WITH THE MAP WITH BW = BORE WELL NON POTABLE ) RP = RECHARGE PIT ( IN METERS ) IN PERCENTAGE ) Kilometers YIELD RANGE AND NUMERIC CODE ) FR = FRACTURED ROCK TW = TUBE WELL VERY HIGH SD = SUBSURFACE DYKE ALPHABETIC CODE ) WR / = WEATHERED ROCK / HIGH HATCHING INDICATE DBW / = DUG CUM-BORE WELL / RS = RECHARGE SHAFT WM WEATHERED MATERIAL DUG CUM-TUBE WELL MODERATE ST = STORAGE TANK DEPTH RANGE) DTW 0 1 2 3 4 5 © IR = IMPERIVIOUS ROCK LOW SCM = SOIL CONSERVATION MEASURES s Channel Bar Groundwater prospects very high t LS CB111 No Well Observed Excellent TW 5-10 m 400-500 LPM Very High P Not Required SCALE - 1 : 50,000 i Nil with high recharge potential. (CB) s Recharge structures not required. o " JALPAIGURI & DARJEELING DISTRICTS, WEST BENGAL MAP SHEET NO. 78B/5 p la o e h SHH93 Groundwater prospects very high Tiger i K Braid Bar No Well Observed " Lingtom TG ill BB111 Excellent LS Not Required R D Nil with high recharge potential. " Hill (BB) TW 5-10 m 400-500 LPM Very High P Bichkamon " Sa " Rayeng m thar Khola Recharge structures not required. @¼ " Nazuk " Dong y " Rangbul Chhota a la o " Suruk h D a K l Groundwater prospects very high i o Point Bar RW b h LS t No Well Observed Very Good P Nil Not Required with high recharge potential. " Senchal m K PB111 5-10 m 300-400 LPM Very High a ) (PB) R k TW u " Rambi t n u S Recharge structures not required. " Rambi y e a Simle s D " Dhura Munshidhargaon e SHM831 " r Alluvium t TW River Island No Well Observed Very Good LS 5-10 m 400-500 LPM High Not Required Highly productive aquifer in RI111 P (Sand Dominant) P Nil " Chatakpur n shallow depth. Good recharge / (RI) SHH921 e (111) " Mangpu n ¼ Bara s @ N " Talkot TG o " Suruk e i r H t RW Highly productive shallow aquifers P S" 2 a LS ¼ 3 CM111 Cut-off Meander TW 10-20 m 300-400 LPM P Nil Not Required Sarail @ 1 ( No Well Observed Good High with good recharge from the river A S3 m (CM) base flow. r " Rangchang o " Sonada Lower Kundong F " It receives good recharge and forms S6 Flood Plain LS FP111 n No Well Observed Very Good TW <30 m 250-350 LPM Very High P Nil Not Required shallow aquifer.Overall quality of " Oaks TG " (FP) " Labda " Lanku o the water is potable. Mamring " Yongri a " Gorabari " Dhargaon g u " Pachang Piedmont Larukh a Good ground water prospect " Alluvium Deep No Well Observed LS TW 60-80 m Moderate Nil Not Required PAD111 h Good 100-300 LPM P at greater depth as the principal (PAD) S aquifer occurs below PAM. Chatakpur Upper i " d " n " Phulbari TG a " Kundong o Paunbu i " ) N Mamring t e a m Alluvium i n Alluvial Plain m h Selphu e h " r Highly productive aquifer at shallow APY113 c (Sand and Silt) Good Nil c Younger No Well Observed LS 25-30 m 200-250 LPM P o TW High Not Required a o " Bagora l depth with good recharge. P Dilaram " F (113) o (APY) i Moonda " Turuk r @¼ H Kotee u " e Yangmakun " g t Upper i a Chhota " a Lower L " Karmath p Kalijhora l " Ringtong Karmath - " a Alluvium Abandoned y J l " Maharani TG " Sudung AC13 / Excellent to LS Nil Highly productive shallow aquifers r Channel No Well Observed TW 10-15 m 250-300 LPM Very High P Not Required a (Sand,Silt & Clay) SHH533 a d with good recharge from base flow. l (AC) Very Good " Ghalaitar E (13) ( a M ) e n " Tung n e o Piedmont c i t o 4 / 2 Good ground water prospect at l a Alluvium Moderate LS PAM18 o Good TW 40-60 m 300-400 LPM Moderate P Nil Not Required moderate depth along piedmont slope. H m . r r (PAM) 2 Bara E o - Alluvium F " Balasa TG " Ringtong TG e S9 n g (Gravel Dominant) " Latpanchor e c n i " Pomabang Mahaldiram TG o (18) " t s Piedmont Low s " Majhua TG i Moderate ground water prospect m e LS PAS18 l Alluvium Shallow Good TW to a No Well Observed P 5 - 10m 50-100 LPM P Nil Not Required . at shallow depth along piedmont slope. S t (PAS) Moderate L " Dilaram ( ) e e s " Deorali Jholi n " n Structural Hill k e i Sandstone & e l a @¼ c Highly c l a ingtong Khola o SHH511 o Conglomerate ch i i h o w K l Dissected R li i " Jangpana TG Ka E (511) P S - ¼ ( (SHH) @ ) r s ) " Singeli TG G u . r o r S r G e e a f a Structural Hill i v n d i n Sandstone a o u Highly R - b SHH533 w r m ¼ o d with Shale a a @ a m Dissected t n C r D o ( s e (533) P (SHH) e G ( e ) ) T c " Mahanadi TG " Malatar TG . i o r m z F Structural Hill G ¼ o @ r g " Mahanadi N g Phyllite 1 e 11 n Highly B n C H t i a Karsiyang l E s s e n t i a l l y r u n - o f f z o n e . D r i n k i n g w a t e r s o u r c e s p r i m a r i l y f r o m s p r i n g s a n d r i v e r / s t r e a m w a t e r . SHH93 o 3 y r " 1 a (93) Dissected Sivok " e P D L i m i t e d p r o s p e c t s w i t h i n I n t e r m o n t a n e V a l l e y s . ( R ( (SHH) " Lizziepur ) ) m ! c F i ª r n 5 " Barbung 3/72 o z a Structural Hill S8 G 5 " Shivitar o E E h g t H " Shvitar TG Simring TG " S Khola r Schist Highly a n ivok e Giddapahar i N " t l SHH921 b o a ¼ " Sirubari u r (921) Dissected @ r D " Springside TG P o ( (SHM) G ( ) e Gitingia TG " x n R2 c e Samardanga i " i l l l o p a z Gauri t m Structural Hill o Granitoid Gneiss/ s o r y " Shankar TG c C e r i t l Moderately SHM831 s Gneissic Granitoid/ C a o s Jogbani TG r i " r t e Dissected P Granitoid Complex Gayabari n ( " n e G C (831) (SHM) " Makaibari TG " Tindharia Gaurigaon " Lepchakheti F F " Selim These are fault / fracture zones, which generally act as conduits for movement of ground water in hard rocks. Along these zones, the yields are significantly higher and wells are likely to be sustainable for longer duration. However, the inferred fractures need to be confirmed by detailed ground surveys. " Hill TG " Kailapani " Chisopani " Narbong TG " Patiadhura Mithadanta" Ratiadenga " Sepoydhura TG D D Q Q P P " These are dykes, quartz reefs and pegmatite veins, which generally act as barriers for ground water movement. D D Q Q P P E E E E E ¼ " Kothidhura New Selim Chunbhati " R @ E E E E E I1 " Hill TG 11 " Marchebong E E E E E E E E E E N.B.-The depth range and yield range of wells may vary within the unit because of certain inhomogeneities. Fractures/Lineaments which are clearly observed / inferred from the satellite image are indicated on the map. There could be some obscured fractures which also influence the ground water prospects. Locations of the recharge structures shown in the map are tentative. This map is useful for narrowing down the target zones,and exact location on the ground for wells and recharge structures should be identified based on follow-up ground hydrogeological/geophysical surveys. " Rohini TG E E E E E SHH511 " Rangtong " Pankhabari " Gulmakhola GROUND WATER PROSPECTS INFORMATION HYDROLOGICAL INFORMATION STRUCTURAL INFORMATION BASE MAP INFORMATION LOCATION INFORMATION DESCRIPTION SCHISTOSITY/ DEPTH RANGE OF WELLS SYMBOL DIPS BEDDING SYMBOL DESCRIPTION YIELD COLOUR o FOLIATION STATE INDEX DISTRICT INDEX PAS18 SHALLOW MODERATE DEEP RANGE CODE CANAL / TANK IRRIGATED AREA GENTLE ( < 15 ) NH - 34 OF WELLS < 30 METERS 30 - 80 METERS > 80 METERS E E E E o NATIONAL HIGHWAY R Jabarhat " GROUND WATER IRRIGATED AREA S MODERATE ( 15 - 45 ) a E E E E o R k SH - 12 ! t Kuklong ! ! E E E E " ! ! i > 800 LPM VIOLET RIVER / STREAM (with sand) STEEP ( 45 - 80 ) STATE HIGHWAY K Q G h u SUB - VERTICAL o l WATER BODY / SPRING @¼ a " Singhijhora TO VERTICAL ( > 80 ) METALLED ROAD l m " Garidhura a 400 - 800 LPM INDIGO CANAL Ö P R E ANTICLINE / ANTIFORM I N D I A i O v RAIN GUAGE STATION OTHER ROAD e R1 800 r ( With average annual rainfall in mm ) «! N Ü S-DARJEELING " Marionbari TG Simalbari TG RECHARGE STRUCTURES SUGGESTED SYNCLINE / SYNFORM c " R WEST SH 12A R 200 - 400 LPM BLUE RAILWAY R-JALPAIGURI o BENGAL Q-KOCH BIHAR o PERCOLATION TANK CHECK DAM h n CM111 PAM18 (! P-UTTAR DINAJPUR i n g NALA BUND O-DAKSHIN DINAJPUR " Khairani RECHARGE WELL E i t TREND LINE M o DESILTING OF TANK N-MALDA K §! R n RECHARGE PIT CITY / VILLAGE M-MURSHIDABAD " Simalbari h 100 - 200 LPM GREEN ^ " u g SUBSURFACE DYKE " o I n ! ! ! RECHARGE SHAFT l K SOIL CONSERVATION ESCARPMENT g a Tarai TG h ´ s o MEASURES STORAGE TANK u la HABITATIONS : NON - COVERED (NC) n " tarai tg " Sukna WELLS OBSERVED DURING FIELD VISIT " g 3/60 ) )¢ " Malibhita ! 50 - 100 LPM YELLOW LITHOLOGY / GEOMORPHIC UNIT PARTIALLY COVERED (PC) K ª " Turibari YIELD RANGE BORE / YIELD RANGE DUG WELL / h 3 o " Mohargang " Prembhita IN LPM TUBE WELL IN m / day RING WELL BOUNDARY la 15/70 3 > 800 LPM ªÇ > 400 m / day (! 8/15 MINOR MAJOR BLOCK INDEX MAPSHEET INDEX " Sikkramjot BOUNDARY : " Gulma TG AC13
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