1-10. , 2S. R. Kumar, 3S. P. Rai, 'M. P.Singh, IS. P. S. Rawat, 3J. V. magi and anagement Studies, National Institute of Hydrology, Guwahati f Hydrology, Roorkee.
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Proceediugs
WARMICE-20.! '
1-10
,2S. R. Kumar, 3S.P. Rai, 'M. P.Singh, IS. P. S. Rawat, 3J.V. magi and anagement Studies, National Institute of Hydrology, Guwahati f Hydrology, Roorkee .
,
n behaviour of these watersheds using Kostiakov model.
cover, geomorphology, area, rial cover in a watershed a1 cycle of that watershed;
Infiltration rates widely vary with differrent landuses under diverse hydroclimatic
infiltration capacity. This is a func-tion 'of soil capacity is minimum and is the characteristics of
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Proceedings WARMICE-2012
Proceedings WARMICE-2012
sequence) of Proterozoic-Cambrian agc
F'IEL,D INVESllGAl MODELLJNG n contenl )rests is : ,
C
r
e depth lile it is
-
Jerage air ture varie -- -- - (maximurr~) - -2--. 1x1 ucgraucu anshed and 18OCto 22OC in forested watershed. ejative humidity is observed minimum in months and maximum in rainy months. vaporati01n rate vari.edfrom I:ninimum 2.5 mml ~m 6 rnrntday in n rainy nnonths tc
----\ ,----mum)
/-
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,--.
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h2009w as measured 2905 rnrn at Arnigadh shed and 2958 mrn at Bansigadh watershed.
I
orie area lies in the Lower The I u;m. Illllldla~a~ is an environmentally sensitive, ve, mine demc)graphic; ing and econ omicall "
onmenta1 belt. The minerals are located in kol n a p5 series of rock which lies on the e area had been
is claim eel in the lwal Himalayas of Mussoorie comprises rocks le Jaunsa u (ChancIpur phyllites and Nagthat .~ ,.A IA.. rtzites) auu L. .r l u ~ ~ o o r i e " G r(Shales, ~up greywa cks, calcareous slates, d limestone of Blaini- Kr'ol- Tal
Hydrological field investigaticIns were ( at various places in the two mcro-watersneds namely, Arnigad and Bansigad Watershed of we1.e carried out using double ring cylindrical infiltrometers (size: 30 cm inner, 45 cm outer A:", ulameter and height 45 cm) made of mild steel sheet. Infiltrometers were penetrated into the ground upto 15cm depth using a wooden hammer striking on mild steel plate ap~ro~riatelv ~hced * on 1top of the cylinders. Both cylinders with water ensuring equal water leve anc measured usillg colnstant hc cylinder) till steady iinfiltratio~ L *
Inf 'iltration modelling is ba.sical1.y n tool for Pre:diction of hydrological be5aviour of a basin. T-,-e h complex mechanism of water movement underneath the land surface and insufficie understanding on the actual processes involvl therein have given to the development of sevei infiltration loss models from time to time. A multitude of infiltration models.qsed in applied hvdrology and soil science exists. The most dely used empiric ion is the: Kostiak The observed data of infiltration rates were fiated with popular Kostiakov infiltration mod el. ti*^^ (1932) provided quati ion own as Kostiak ; given a!2: j-= a.p.rp-lI
where, 'f' is rate of water inf
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and, 'a' and 'p7 :ire empirical con constant 'a' depenc1s on soi1 charact
104
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aCkha
r'is
where C : fter tak f&er re
infiltratic presented
infiltration rate unde
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2s0g :$;\; . . :;*y ' .,. C
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?.$*F, :&fi:;,
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I& Inlil. Rate krnchr:
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