Rainfall-Runoff and Soil Erosion Modeling Using

Photonirvachak i"".""i"f tit. lndian Society of Remote Sensing, Vol' 30' No' 3' 2002

Rainfall-Runoff and Soil Erosion Modeling Using Remote Sensing and GIS Technique A Case StudY of Tons Watershed

A

S JASROTIA', S D OHIMANz

AND

SP

-

AGGARWAL,

University,ofJammu' Jammu-180 006 India 'Oepurt n"rrt of Geology, tnepurt*ent of Civil fngirieering, Birla Vishvakarma Mahavidyalaya'Vallabh Vidyanagar-388120 Gujarat' India 001,lndia 3water IndianYnstitute of Remote Sensing, Dehradun-248

'

Resources Division,

ABSTRACT

Inthepresentstudy,therainfall-runoffre|ationshipis.determined.lsin.gUSDASoil 0.99, which

r.irr"J. The coefficient of determination (R2) is runoff potential map was inal.ut., a high conelation U.t*."n rainfall and runoff. The

conservation Service 200

o=:-?6*

1 : '151304

Fig. 10. Runoffpotential map of the Tons watershed'

N

*

n @t

50

5000 0

1 :281005

Fig. 11. Annual soil estimation (Vha) shows in Tons watershed

l'77

178

A.S. Jasrotia er a/.

N

,F 3370000

5000

?90000

5000 0

1 :201006

Fig. 12. Priority Sub-watershed Map shows the priority area for'soil Conservation

Table 3. shows the average soil loss in the sub-watersheds Sr no

Sub-watershed

Average Soil loss in t/ha

I

Subwatershed-l

24.1

2

Subwatershed-2

23.0

3

Subwatershed-3

17.2

A

Subwatershed-4

14.1

As seen in the above table sub-watershed -l has average soil erosion of 24.1 t/ha. Hence priority for soil conservation should be given to this sub-watershed. Figure 12 shows the priority for soil conservation in the Tons watershed.

Conclusions The rainfall- runoff relationship for the Tons watershed was obtained using SCS curve method in remote sensing and GIS environment. The

Using Remote Sensing and GIS Technique"' Rainfall-Runoff and Soil Erosion Modeling

whir;h coefficient of determination (R'z) is 0'99' and rainfall inai.ur"t a high correlation between

De - Roo, A'P., Hazelhoff,

L'

and Burrough' P-A'

19b9). Soil erosion modeling using )eNswEns' arid geographical information

(

system. Earth Surf. Proces' Landf',

runoff.

The runoff potential map was prepared by to assigning individual class weights and scores where areas in inprit *ips. Higher runoff occnrs

Fi"+.ttiu.y und tvtiddt" Siwalik rocks exist' Stmcnual and leomorpnltogic units are very steep to with hills, b"n rdation Structure scrub land mainly is use land and *""p tfop"t and open forests'

Arutual spatial soil loss estimation for the study area was carried out using Morgan' in Morgan and Finney mathematical model conjinction with remote sensing and GIS to techniques. Higher soil erosion was found watershed' occur in the northern part of the Tons

The soil texture in the affected area is

coarse

loamy to loamy skeletal' Hence soil detachment

is higher. Moreover the land use has open for"rf,, which does not reduce the impact of rainfall. The average soil loss for all the four sub-

it was found that of 24'l tlha loss soil average the maximum for soil Hence l sub-watershed the in ' o.crrrred given conservation, very high priority should be

watersheds was calculated, and

to sub-watershed

l.

14 517-532'

A'K' (2002)' GIS based groundwater qu-allty between coirelation

Dhiman, S.D. and Keshari,

pururn"t.t and geological units' In: Proc' of Int'

conf. Map India Feb' 6-8' 2002 Delhi' Indta' A' R.P., Saha, A'K', Arora' M'K' and Kumar' Cupta. --"-iis99l. the part of a in Hazardzonation I-andslide

bttagirathi valley, Garhwal Himalayas' ullng Him' intelrated remote sensing-GlS' Jour' of Geol., 20(2): 71-87

Hariprasad,

V. and Chakraborti, A'K' (1997)' of small watersheds using

'Management

ityAt"i"gi. modeling on

R.--ot.

and GIS' International Conf'

Sensing and GIS/GPS, March' pp' 16

-l 9. (1998). The ITC, 'lniormation

Integrated Land

ioi n..otpu.i

?:{ .Y"t*

(3'o end)' Int' lnst' Su'uty and Earth Science' The

System

(ILWS)

Netherlands.

of Jain, M.K. and Kothyari, U'C' (2000)'.Estimation ----'*lf GIS' using yields sediments

erosion ani Hydrot. Sci. Jr., Proc' IAHS, In Press' S.K., Kumar, N', Ahmad, T' and Kite'.G'W' Jain,'tiSS8l -SLURP model and GIS for estimation of in part of Sutlej catchment' India'

iunofi

Hydrologicai Science- Joumal Des

Sciences

HYdiologiuques' a3(6)'

Acknowledgement

This work was carried out during

the The NNRMS training course in June-July 2001'

authors are highly thankful

to

Dean IIRS-

Deluadun and Head, Water Resources division

IIRS-Dehradun for providing the

necessary

GIS for Jain, S.K., Das, K'K' and Singh, R' (1996)' of Joumal potential' estimation of ilirect runoff 4247 2(l): Society, ' Resources Indian Water arsenic Keshari, A.K. (2001). Hydrological risk. of GIS & Delta Bengal West contamination in

applicability. International Workshop on pifnvA.ofogv, Nov 25-30, 200l,LINESCO-IHP

facilities.

t.ti.t (Ed; V.

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