L E G E N D GROUND WATER PROSPECTS MAP GEOMORPHIC DEPTH TO RECHARGE G R O U N D W A T E R P R O S P E C T S RECHARGE MAP UNIT GEOLOGICAL SEQUENCE / 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 SUITABLE IN THE UNIT GROUND REPRESENTED IN (AVERAGE IN METERS) OF WATER OF WELLS OF WELLS WATER & SUCCESS WATER PT = PERCOLATION TANK THE MAP WITH ( SUGGESTED ) ( EXPECTED ) RATE OF WELLS POTABLE (P) IRRIGATED CD = CHECK DAM ALPHANUMERIC CODE NON - POTABLE (NP) NB = NALA BUND ( RAINFALL & OTHER LS AREA NO. OF WELLS = 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) OBSERVED RW = RING WELL ( INDICATE REASONS IF DT = DESILTING OF TANK FIR = FISSURED ROCK ( APPROX . RANGE ( COLOUR INDICATES THE MAP WITH THE MAP WITH BW = BORE WELL NON POTABLE ) RP = RECHARGE PIT FR ( IN METERS ) IN PERCENTAGE ) Kilometers YIELD RANGE AND NUMERIC CODE ) ALPHABETIC CODE ) = FRACTURED ROCK TW = TUBE WELL VERY HIGH SD = SUBSURFACE DYKE WR / = WEATHERED ROCK / HIGH HATCHING INDICATE DBW / = DUG CUM-BORE WELL / RS = RECHARGE SHAFT WM WEATHERED MATERIAL DTW DUG CUM-TUBE WELL MODERATE ST = STORAGE TANK DEPTH RANGE) 0 1 2 3 4 5 IR = IMPERIVIOUS ROCK LOW SCM = SOIL CONSERVATION MEASURES s © t i Groundwater prospects very high Braid Bar No Well Observed BB111 s Excellent LS Not Required (BB) TW 5-10 m 400-500 LPM Very High P Nil with high recharge potential. SCALE - 1 : 50,000 o Recharge structures not required. p e MAP SHEET NO. 78B/9 DARJEELING & JALPAIGURI DISTRICTS, WEST BENGAL D Groundwater prospects very high Point Bar RW y No Well Observed SHH93 PB111 Very Good LS 5-10 m 300-400 LPM Very High P Nil Not Required with high recharge potential. " Sinji a (PB) TW ¼ Pemling @ " Ambiok Recharge structures not required. S " a Sinji1 D mt " " Lulegaon ) har SHM831 Kh Dalim " ol " Mangzing t a ) " Sinji1 " Nim n y e Pokhribong a Highly productive aquifer in " SHH921 s River Island No Well Observed Very Good LS 5-10 m 400-500 LPM High Not Required " Samthar1 RI111 TW P Nil e shallow depth.Good recharge. D (RI) Dalapchand r " Alluvium P t " Kabigaon / (Sand Dominant) SHH921 n n (111) e o ¼ Upper i Meander Scar No Well Observed LS @ s Very Good Highly productive shallow aquifers " Samthar Kamenoy S5 PB111 MS111 t " " Phagu SHH511 TW 10-15 m 200- 250 LPM High P Nil Not Required Lower e a (MS) SHH93 with good recharge. Gorubathan1 r @¼ Dalim " m r E E E " P Shaldara " ( Khopigaon o Charkhola " " E E E F " Nimbong E E E It receives good recharge and forms E E E FP111 Flood Plain No Well Observed LS <30 m Very High P n Very Good TW 250-350 LPM Nil Not Required shallow aquifer.Overall quality of Tamching " E E E E E E Sharmili " o (FP) the water is potable. " Tunibote E E E E E " Pupung E E E E E E FP111 a " Barbot E E E E E g a E E E E E E E l Gorubathan1 u E E E E E E E E E E E E o " E E E E Eh E E E E E E E Piedmont Nimbong a K Good ground water prospect la )" SHH533 E E E E E E E E E E E E E E g E E h o Pailolen E E E E E E E E PAD111 Alluvium Deep No Well Observed Good LS TW 60-80 m 400-500 LPM Moderate P Nil Not Required at greater depth as the principal h n " Rate K E E i " ) E E E E E E Patharjhora " S " Pabringtar E E E E E E E E E z E E E E E E E BB111 (PAD) n g aquifer occurs below PAM. a n E E E E E E E E a Gorubathan E a E E l h E E E E E E E E E E E E E o " s BB111 PAS18 M Ale u E E h E E E E E E E E E E n T E E E E E E E E E E E E E E K o Mal " Basti ) E E i a e Mungpei E E E E E E E E E t " Nabgaon " E E E E E E E E E E E E E E h " Basti a Danbar Danbar Mission n Alluvium k E E E E Alluvial Plain " Nobgong E E E E E E E E E E e E E u E E "EBaEsti1E E "EBasEti E E E E m " Hill TG APY113 c (Sand and Silt) Good Nil r No Well Observed S E E E E Younger 25-30 m 200-250 LPM High P Not Required E E E E o LS Highly productive aquifer E E E E E E o TW E E E E E E E E EFEP1E11 E E E E l (113) F E E E o (APY) having good recharge. E E E E E E E E E E E E E E E i E E E H E E E E r " " Lumbrek PAS18 E E E u " E E E E E E E E E E E E E Lower Phagu TG e Nobgong1 E E E E E E t Bhandari " Gyashokgaon E E E g i E E a E E E E E E E E E a " Dara E E E E E E E E E L i p - l d E E E E E E E E E E a E E E E E E E E E E a y Alluvium Abandoned l N J / E E E r i E E E E E E E E E E E E E E E E E AC13 Channel Excellent to 250-300 LPM Nil a 10-15 m Very High a LS P Not Required S3 h " Patharjhora TG (Sand,Silt & Clay) No Well Observed Highly productive shallowaquifers t d TW E E E E E E E E E E E E E E E E l E E E E E ( (AC) Very Good m " Gyashokgaon1 (13) with good recharge from base flow. a a E E E E E E E E E E E E E E E E E Bhuta " Yaibong R E M " Chuikhim Basti SHH533 E E E E E E E E E E E E E E E E E E " E E E E E E E E E E E E E E E E E E " Kambal ) E E E E E E E E E E E E E e Piedmont E E E E E n E E e E E E E E E E E E E E E E E E E c Alluvium Moderate No Well Observed Not Required Good ground water prospect 4/65 PAM18 n Good LS TW 40-60 m 300-400 LPM Moderate P 10 Bhuta o l " Chunabhatti E o E E E E E E E E E i (PAM) at greater depth along piedmont slope. E E E E! E o E E E t ª " Basti1 a Yangmakun H " E E E E E E E E E E . E E E E E E E E r " Toribari m r E E E E E E Alluvium E - E E E o Makun E E E E E E E E E " e Phengtar F (Gravel Dominant) " E E E E E E E E E E E E E n E E E E E " Delingkot TG g e n c (18) E E E E E E E E E E E E E E E i E E o i E s t Piedmont d s E E E E E E E m TW Low E E i E E E E E E Ea E E " Minglass TG PAS18 a e Alluvium Shallow No Well Observed Good LS N l Moderate ground water prospect E E E E E E E E E E E S DTW 5 - 10m 50-100 LPM to P Nil Not Required i E E E E l E E E P d e . (PAS) t at shallow depth due to piedmont slope. E E E E Ea E E R3 Moderate E E E E h E E E E E E E Dalimkot L N " C ( E E E E Ei E E h E E E E E E E E E E E t Nidim E E E E eE E L E E E E E E E E E E E E " Syli ) e s e E E E E E E E E E E E E E n Structural Hill E E E E E k n i SHH511 " Toribari1 e Sandstone & l e Highly E E E E E E E E E E E E E c E E E E E a Conglomerate SHH511 c Malnadi " o w i E E i Dissected E E E E E E E o E E E E i E E E E E E l d (511) a E FP111 S P (SHH) E E E E E E E E E E E - E E E ( E E E E E N RI111 Syli l E E E E E E " Nayakaman " E E ) E E E E E E E E E E a s M r u E E E ) E E E E E G E E E E E o Maynabari1 E E E E E .