OBJECTIVES

Identification of suitable jute geotextiles (JGT) material and

application technology for hill slope protection in different

agro-climatic situations in India.

Identification of suitable vegetative species and their

performance under JGT application.

Assessment of JGT application on soil loss and runoff

through simulated laboratory studies (runoff

plots/hydraulic flume)

Duration : 3 years

Year of start : 2010

Sites selected for JGT application at 3 locations

representing different hill eco-systems in India viz;

Western Himalaya (Dehradun HQ)

Shivalik hills (Chandigarh Centre of Institute)

Nilgiris hills (Ooty Centre of Institute)

Technical details of sites worked out.

Three types of JGT i.e. 500, 600 & 700 GSM applied at site

by Dehradun, Chandigarh and Udhagamandalam Centres.

PROGRESS OF WORK

Sl.No.

Particulars Dehradun Chandigarh Ooty

1. Location Chakrata hill, Uttarakhand Phedulani – Aara PMGSY road (Ashti bend) – about 100 km from Dehradun

Punjab Shivalik Range – Ropar – Noorpur bedi road, (a) 6 km from Ropar (b) 1 km away towards Noorpur bedi.

a)Research Farm, Ooty b) Keraihada site c) Ketty site

2. Slope steepness 35 (70%) a) > 100% b) 20-30%

a) 16-20% b) 25-30% c) 35-40%

3. Nature of slope material

Coarse sand - 49% Fine sand - 23.4% Clay - 15.2% Silt - 12.4%

Coarse sand - 76% Fine sand - 16% Clay - 4% Silt - 4%

Res. Farm Site Coarse sand - 30.3% Fine sand - 19.5% Clay - 37.5% Silt - 7.5%

4. Whether in seismic zone

Yes (High seismic zone IV)

Yes No

5. Soil texture Gravelly sandy loam Sandy clay, sandy loam Clay loam 6. Geological

features Fragile geology Lithologically fragile Stable

7. Frequency of landslips

Frequent during monsoon Frequent during heavy rains Occasional during heavy rains

8. Annual rainfall 1400 mm (1200-1600 mm) 656 mm (600-900 mm) 1200 mm (767-2017 mm)

9. Temperatue (Max-Min.)

34 -1 38.5 -6.4 19.3 -8.4

SALIENT INFORMATION ON SELECTED SITES FOR JGT APPLICATION

Installation of JGT at Ashti

site, Chakrata Hills,

Uttarakhand,

N-W Himalaya, executed by

CSWCRTI, Dehradun

January 4th, 2012

A close view of the untreated site Geojute bundles being transported to site

JGT laid on ground (04.01.2012) Wooden pegs used for anchoring JGT

JGT secured by constructing a trench on

upper side

Inspection of the JGT layout by experts of

CSWCRTI & NJB (04.01.2012)

PERFORMANCE OF JGT

Performance of JGT after 6 months (July 2012)

Vegetation in the JGT area (after one year)

Survey of vegetation in JGT area

Geojute material Frequency Density700 GSM -Site I 700 15.6600 GSM - Site II 580 14.0500 GSM - Site III 820 14.8Control 240 6.0

Frequency and density of herbs, shrubs and grasses at sites treated with different geojute materials and control

Performance of JGT after 1 /2 years (17.07.2013 )

Grasses & shurbs coming in geojute area

Area is freely grazed by goats

JGT reinforced staggered retaining walls (on downward side) performing well in

retaining debris

AFTER ONE & HALF YEARS

A general view showing JGT application for hill slope management and JGT

reinforced retaining walls below

Performance of JGT in degraded hill slopes (July 2013, see gravels

below)

JGT reinforced retaining wall for debris retention and slope stabilization (A close view)