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18 Map 1.2 Distribution of various land uses in Chandigarh N W E S NRIS National (Natural Resources Information System) Dept. of Space Sponsored Project Executed By: Punjab Remote Sensing Centre Ludhiana In Technical Collaboration With Regional Remote Sensing Service Centre Dehradun Map1.3 Details of distribution of various land uses in Chandigarh LEGEND N W E S Kilometers 6 2 Kilometers Source : PRSC, Ludhiana Satellite Data: IRS-1D liss-iii + PAN MERGED DATA Date of Pass: 05/03/2001 The distribution of various land uses as per Punjab Remote Sensing Centre, Ludhiana (PRSC) is presented in Maps 1.2 & 1.3. Data indicates that a large portion of the land (about 69.6%) falls under urban category, 5.4% of the area is under village habitation, 7.2 % of the area is under agricultural use, 7.7% under forests & other plantations, 1.6% is under Sukhna Wetland, 3.1% under other water bodies and rest of the area is under vacant land (3.8%) and miscellaneous uses(1.6%). In addition to the above, sq km additional area has been acquired and declared as Sukhna Wetland Sanctuary. Hence, the total area under forests is sq km, out of which sq km area is under hilly forest, 3.90 sq km is under Sukhna Choe forest & PatialaKi-Rao forest and 1.05 sq km of the area is under Lake forest (Map 1.4).

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69 Fig Satellite Image of Sukhna Lake Fig Monitoring of water spread/aquatic vegetation and turbidity of Sukhna Lake A YEAR: 1967 DATA: SOI TOPOSHEET WATER SPREAD 150 ha. N SUKHNA LAKE CHANDIGARH CITY B SEASON: POST MONSOON (OCT 86) DATA: SPOT 1 WATER SPREAD: 142 ha L SUKHNA LAKE Source: PRSC, Ludhiana CHANDIGARH CITY Table 4.5 Variations in water spread (ha) in Sukhna Lake Data Set Year Season SPOT TM LANDSAT TM B/W Aerial Photographs IRS-1A-LISS II IRS-1A-LISS II Post-monsoon Spring Water Spread (ha) C SEASON: PRE MONSOON (MARCH 87) DATA: LANDSAT TM WATER SPREAD: 120 ha M S S Spring Post-monsoon Pre-monsoon SUKHNA LAKE * Total differs from sq km reported elsewhere by Forest Deptt. Source: PRSC,1994 CHANDIGARH D SEASON: POST MONSOON (OCT92) DATA: IRS-1A-LISS I (DIAPOSITIVE) WATER SPREAD 153 ha L The drainage map (Map 4.3) reveals that the drainage pattern is dendritic and sub parallel. The high drainage density in the catchment indicates severe erosion. During the period , the course of Sukhna and Kansal nadis have changed considerably. Further, to check the influx of silt, the course of Kansal nadi was diverted towards Sukhna nadi in 1972 where it merges with it and ultimately feeds the lake. Seasonal variation in water spread of the lake (pre and post monsoon) has also been studied (Table 4.5). Sukhna wetland has also been classified on the basis of turbidity using pre and post-monsoon data of 1986/1987 and 1992/ It has been observed that during postmonsoon season it has low turbidity whereas in premonsoon it has moderate turbidity (Figure 4.13). IMPACTS Frequent change in land use pattern to bring more areas under urbanization, developmental activities and deforestation in the peripheral zone, and generation of high CITY W S W SUKHNA LAKE CHANDIGARH CITY E SEASON: PRE MONS0ON (MAY 1993) DATA: IRS-1A-LISS I (DIAPOSITIVE) WATER SPREAD: 134 ha M V W SUKHNA LAKE CHANDIGARH CITY L E G E N D TURBIDITY CLASSES OF SUKHNA LAKE VEGETATION TURBIDITY SYNBOL L LOW M MODERATE V SCRUB VEGETATION H HIGH S 1 0 W AQUATIC WEEDS 1 2 SILTATION 3 Km Source: PRSC, Ludhiana 57

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