Simple tables to explain which maps shall be used for planning,

And where to obtain them from and what is their use:

 

There are four phases in which the maps should be developed for any watershed area using the GIS techniques.

 

 

PHASE I OF GIS PREPARATION:

 

S.No.

MAP

Source

Use

1.

Watershed Geo-coded map (1:50,000)

Mission or
Zila Panchayat

Miliwatershed boundary

Geo-coordinates (lat long)

2.

Mazmuli Map (1:10,000)

Revenue or NCHSE

Village boundaries

3.

SoI Toposheet (1:25,000)   or

SRTM data from NRSA for contours

Survey of India

Drainage, Villages within watershed, Landuse, contour (5meters)

4.

Remote Sensed data

CartoSAT 2.5m or 1m resolution

NRSA

Up-to-date Drainage

 

 

PROCESS:

 

Precise Miliwatershed boundary delineation based on Miliwatershed area, drainage and slopes.

 

Microwatershed boundary delineation

 

 

Output: MILIWATERSHED PRECISE AND UPTODATE BOUNDARY MAP SHOWING MICROWATERSHED BOUNDARIES.

 

Microwareshed area can also be calculated. Length of streams may also be noted. - to support action plan tabulation.

 

 

 

PHASE 2 OF GIS PREPARATION:

 

 

S.No.

MAP

Source

Use

5.

Khasra map (1:4,000)

Patwari

Khasra boundaries

6.

Khasra Data

Patwari registers copy

Landuse and ownerships

 

PROCESS:

 

Superimpose khasra map with Microwatershed boundary, Drainage, Slope

 

 

 

 

 

Output: Microwatershed map showing Khasra and Landuse, latest Drainage and slope.

 

 

 

 

PHASE 3 OF GIS PREPARATION:

 

OTHER MAPS FOR REFERENCE PURPOSE

 

S.No.

MAP

Source

Use

7.

Geology (1:2,50,000)

GSI

Geological formations helpful in analyzing site suitability for structures

8.

Geo-morphology

Distt. Plans

Geomorphology details helpful in analyzing site suitability for structures

9.

Soil

 - Strata

 - Type

NBSS

Soil details helpful in analyzing site suitability for structures

10.

Groundwater status data

Groundwater Potential map

CGWB reports

Soil details helpful in analyzing need of treatment and site suitability for structures

 

 

PHASE 4 OF GIS PREPARATION:

 

MAPS PREPARED BASED ON PNP Data:

 

S.No.

MAP

11.

Slope direction indicator map

 

Optional: use of ETS for micro areas

12.

Soil Erosion map

13.

Ground water Well Data

14.

Land use data

15.

Cropping pattern data

16.

Irrigation status

 

 

All such maps put together help to formulate an errorfree, foolproof action plan.