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IAPRS & SIS, Vol.34, Part 7, “Resource and Environmental Monitoring", Hyderabad, India, 2002 
  
consisting of schist and quartzite. The soil is loamy to sandy 
loamy. Hydro-geo-morphologically the study area mainly 
consists of alluvial plain, pediment and structural hills. The 
study area has sub-tropical continental monsoon climate. The 
total average rainfall of 445.9 mm distributed over a period of 
23 to 35 Days is erratic. May and June are the hottest months, 
while January is the coldest. Temperature variations are high: 
4°C to 25°C during winter and 30° to 40°C during summer. 
Relative humidity is generally low. The area is also experiences 
climate uncertainty and there is sporadic occurrence of drought. 
AIM & OBJECTIVES 
It is very difficult to develop the large area in one stretch 
due to some geo-environmental or economic conditions. 
So there is a need to prioritize the area while applying the 
development program. The aim of the study is to prioritize 
the micro-watersheds based on the morphometric 
parameters with the help of GIS technique. 
DATA USED 
IRS-IC LISS-III, Geo-coded FCC, dated 8" October 1998 
and 8 march 1999, updated drainage map, Survey of India 
toposheet No. 54A/13, 54A/14, 54E/1 and 54E/2, was used 
for the present study. 
METHODOLOGY 
The updated drainage network map and. micro-watershed 
boundary was on screen digitized in MapInfo and exported 
to ArcInfo GIS software for data preparation like editing 
and converted into real coordinate system. These data was 
finally exported to MapInfo Professional GIS software for 
morphmetric analysis. The data was calculated in two 
aspects linear aspect and areal aspect. Linear aspect 
includes stream order, number of streams, length of stream 
and bifurcation ratio. Areal aspect includes micro- 
watershed perimeter, area, stream frequency, drainage 
density, and drainage texture. The stream order was 
calculated by Strahler's stream-segment method. Each 
finger-tip channel is designated as a segment of the first 
order stream. At the junction of any two first order 
segments, a channel of the second order is produced and 
extends down to the point where it joins another second 
order channel produce the third order and so on. There are 
fifty-four micro-watershed in the block, out of these five 
micro-watershed was not included in the present study 
because of no streams in this block. The length of stream, 
number of stream, area and perimeter of micro-watershed 
was calculated in MapInfo by its command syntax. The 
geometry of the micro-watershed was studied by 
calculating the form factor, circularity index and 
elongation ratio by using the following formulas. 
1. Horton’s Form Factor 
F = A/L? 
Where F is Form factor indicates elongation ratio of the 
basin; A is area of the basin; L is Basin length. 
2. Miller's Circularity Index 
C=4nA/P 
Where c is Circularity Index; A is area of the basin; P is 
perimeter of the basin. 
3. Elongation ratio 
R 2 2/L * VA/ n 
Where R is Elongation ratio; L is basin length; A is area of 
the basin. 
The formula of other parameters is following: 
Bifurcation ratio 2 Nu/Nu,, 
Where Nu is number of stream of particular order, 
Nu,, is numbers of stream of next higher order. 
Drainage density = Length of the stream/Area of the basin 
Stream frequency = Number of stream/ Area of the basin 
Texture ratio 2 2/Ly * VA/ x 
Where L, is Basin length and A is Area. 
After calculation the drainage morphometric parameters, 
the thematic map is prepared with three categories i.e. 
High, Medium and Low. The value of the morphometric 
analysis was shown in Table — 1.The rank of micro- 
watershed was also calculated for the prioritization. 
The rank was calculated for each watershed. Four 
parameters like Bifurcation ratio, drainage density, stream 
frequency and texture ratio. The higher value these 
parameter was given the first rank, next higher to 2" and 
so on. In the next three parameter like form factor, 
circulatory ratio and elongation ratio, the lowest value was 
the first rank, next higher value has second rank and so on. 
The mean rank was calculated for each micro-watershed. 
Then the priority was set. The lowest mean value was set 
to first priority, next higher mean rank has second priority 
and so on. So the highest mean value was low priority & 
low mean value has high priority. 
There was 49 priority was calculated as shown in Table - 
2. These 49 priorities were classified into three categories 
like high, medium and low priority. These categories were 
mapped in MapInfo software. Maps are also prepared for 
the all parameters of morphometry of the micro-watershed 
as shown in Map-2. 
ANALYSIS AND RESULT 
The study of drainage in the Ferozpur Jhirka reveals that 
most of the drainage in the Aravalli slopes originate on the 
local hills and traverse through the village, which they are 
locally called as nala or kholla. The drainage and their 
tributaries are ephemeral and carry water only for short 
duration during monsoons period, beyond which no 
surface flow is observed. Generally these streams do carry 
little amount of water, which is not in any significance to 
agriculture. The drainage bed is almost flat, showing sand 
deposits, with banks rising to a maximum height of seven 
to tem meters, showing ravine formations. 
525