• Flat No. 303, Devdarshan Apartment, 20/1, South Tukoganj, AB Road, Indore 452016, India
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Intervention in Rangvasa Lake

“Peri-urban Lake restoration/conservation for creating emergency water management options”



Rangvasa Lake Today...




This lake is located in centre of Rangvasa village near Rau railway station and is nearly rectangular in shape. Its boundary is well defined. The area of the lake is approximately 3.8 hectares and it has a maximum depth of 6m. This lake used to be a perennial about 20 to 25 years ago and it was managed by the community. A bathing Ghat was built on the lake signifying its importance to the community. Earlier fishing and water chestnut (Singhada) cultivation was being done. It still holds importance for the community for religious purpose and day to day socializing.

 

Location Rangvasa, Rau-Rangvasa Road, Indore
Latitude 22°38'40.74"N
Longitude 75°47'22.26"E
Village Rangvasa
Administration Gram Panchayat
Area 4.22 ha
Depth 6 m

 

The Lake has become seasonal due to increased percolation rate after over de-silting and now it holds water for only 3-4 months in a year post monsoon. Rangvasa Lake is mainly fed by rain and storm water. Sewage inflow from households of a part of the village also enters the lake perennially through the storm water inlet. The storm water drainage is nearly 250m long and is covered by households along the road. Due to that, half of the water from catchment flows to the western part of the village. Soil mounds have been formed in the lake due to improper de-silting of submergence. There is no proper outlet for this lake. A few varieties of birds are seen.

 

 

 

Although Rangvasa Lake has a partially rural catchment, the nearby areas are growing rapidly and the lake will soon become a typical urban lake. Therefore, it will be vital in performing various functions such as groundwater recharge, support biodiversity and provide livelihoods to poor households.

The lake is an important source for groundwater recharge and could potentially be used as a source of water for other low end usage after treatment. It acts as a cooling agent for nearby areas and improves the ecosystem to catalyze the microclimate positively. The lake still exists as a Common Property Resource and provides a valuable public space for day to day socializing and recreational activities thus benefiting the entire community.

De-silting of Rangvasa Lake and plantation on the embankment has been done by the Gram Panchayat.

 

 

 

Flora around the lake




 
The main species found in the lake were:

 

Alternanthera bettzickiana (Regel) Nicols.

 

Eichhornia crassipes (Mart.) Solms.

 

Glinus lotoides L.

 

 

Ipomoea carnea Jacq. Ssp. Fistulosa Austin

 

Oxalis corniculata L.

 

Parthenium hysterophorus L.

 

Portulaca oleracea L.

 

Rumex dentatus L.

Trigonella occulta Del.

 

Rorippa indica (L.) Hiern.

 

Settlements around the lake




No. of HH in catchment 400
Water supply arrangement Groundwater
Approximate groundwater withdrawal in catchment 550.56m3/day
Approximate grey water discharge into lake 10.25m3/day
Catchment Area 43.49
Slope 2% S to N
Paved area 30%

The Rangvasa village has total 1400 households, which are further subdivided into six settlements. Out of these about 500 houses are located in the catchment of Rangvasa Lake.

The approximate catchment area is 36.90 hectares out of which 13 hectares is urban residential and the rest is rural. It has a 2% slope from south to north. The paved/built up area covers 30% of the catchment. The settlements in the catchment are entirely groundwater dependant.

The problem of water logging persists only on empty plots in the village and lasts approximately 2 months during the monsoon.

 

House Details

Since maximum houses are of RCC, this indicates middle to upper SEC. RCC is the most prominent roof type in the area. 65% houses have RCC roofs. Tin sheets are also common with 33% houses having this type of roof.

Water Supply Arrangements

The catchment is entirely groundwater dependant. Piped water supply through an over- head tank serves 550 households of the village and the water supply system is managed by the Gram Panchayat. In the catchment, 29% use government stand posts and 20% use private bore wells.

Toilet Arrangements

76% of the catchment has access to toilets. Pit based toilets are commonly available. 24% practice open defecation and open defecation can be seen on the embankment and lake bed when lake is dry.

Grey water disposal arrangements

Approximately 40 households are connected to the covered storm water inlet and discharge grey water into the lake. There is a nala flowing behind the village where maximum households discharge their grey water. Only 6% have no disposal facility.

Solid waste arrangements

Majority of the catchment (96%) dumps their solid waste in open spaces. Only 4% use govt. bins for solid waste dumping. Thus, a lot of solid waste can be seen in and around the lake and an integrated approach would require creating a solid waste management model.

 

 

 

Identified Issues




 
The main species found in the lake were:

 

 

Sewage inflow into the lake

Religious waste dumped into the lake

Heavy solid waste dumping on embankment and in lake

Lack of proper maintenance of covered inlet causes reduction of inflow

Reduction in water retention capacity of the lake due to heavy uneven de-silting

 

 

 

 

 

 

 

 

 

 

Other Issues
1. No proper path of outflow can cause flood in heavy rains
2. Foul smell and mosquitoes

 

 

Priorities for conservation




Talavali Chanda is a perennial lake used for fishing and domestic use. A large part of the catchment colonies are groundwater dependant. The lake is located relatively close to the city and the area around the lake is developing rapidly. Therefore, proper development, restoration and conservation of this lake could create a lake that is a source of groundwater recharge, livelihood generation as well as could improve the land value of this lake property for real estate developers.

 

Our Approach




Flora around the lake




The main species found in the lake were:

 

 

Alternanthera bettzickiana (Regel) Nicols.

 

Eichhornia crassipes (Mart.) Solms.

Glinus lotoides L.

 

Ipomoea carnea Jacq. Ssp. Fistulosa Austin

Oxalis corniculata L.

Parthenium hysterophorus L.

 

Portulaca oleracea L.

Rumex dentatus L.

Trigonella occulta Del.

Rorippa indica (L.) Hiern.

 

 

Possible Interventions




• In situ bioremediation treatment of the lake water.
• Lake Catchment treatment to improve inlet water quality.
• Constructing a new path for the outflow of the lake to avoid natural and manmade flooding.
• Checking the water logging resulting from seepage through repairing of embankment.
• Creating recreational options to improve aesthetic value of the lake.