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Hyderabad Metropolitan Water Supply & Sewerage Board HMWSSB

168K views 488 replies 25 participants last post by  va20152 
#1 ·
Hyderabad Metropolitan Water Supply & Sewerage Board thread
 
#358 ·
HMR digs up a Nizam-era surprise




Metro Rail construction teams are by now used to hitting huge hard rocks, utility pipelines and cables while laying foundations for piers and pillars.

However, they were in for a surprise few days ago when while digging on the Public Gardens – Telugu University line and the M.J. Market stretch, they encountered a decades-old Nizam era storm water drain. The drain, which was 10-feet deep, was not detected during the soil testing phase and came to the fore only when the excavation was taken deep for laying the foundation of the Metro Rail piers.

The storm water drain was functional and water was gushing through it at considerable velocity towards Chaderghat and Musi River. Officials, however, admitted that it was difficult to ascertain the origin of the drain.

“It’s a beautiful construction. Generally, we do not expect any pipeline at such depths. No one knew about it,” said Hyderabad Metro Rail managing director N.V.S. Reddy.

He pointed out that neither the GHMC nor the Water Board (HMWSSB) had any maps or drawings to show the existence of such a drain. The water might be flowing in from near the tracks adjacent to the Nampally railway station, which gets flooded during heavy rain, Mr. Reddy reckons.

The drain was also built in such a manner that the water flow was contained within the series of curves and could have been connected to underground storm drains with links to Lakdikapul and Masab Tank, officials said.

The challenge for the engineers of HMR and the concessionaire L&T Metro Rail Hyderabad (L&TMRH) would be to now build piers foundations in such a manner that they either circumvent the storm water drains altogether, by building an parallel pipeline of three metre-diameter or more.
 
#370 ·
Groundwater levels increase in Hyderabad

http://www.deccanchronicle.com/131003/news-current-affairs/article/groundwater-levels-increase-hyderabad?page=show



Hyderabad: As the monsoon begins to withdraw, it leaves in its wake some very satisfied citizens of Greater Hyderabad.

Groundwater levels have gone up in the city. The average groundwater level was 6.27 metres on October 2 last year, which is 5.94 metres now.

The groundwater table has risen across the city — from the IT corridor of Hitec City and Gachibowli to Darulshifa and Chandrayangutta in the old city, Maredpally and Secunderabad in the new city and Uppal and Qutbullapur in the surrounding municipal circles. Urban areas of Ranga Reddy district have also benefited.

Hyderabad district recorded 15 per cent excess rainfall between June and September this year. Experts also attribute the rise in water table to construction of rainwater pits by many colony and apartments associations, and individuals besides government agencies like the GHMC and the Water Board.

The increase in ground water levels is crucial keeping in mind the lack of inflows in Osman-sagar and Himayatsagar this year.

Due to encroachments in its catchment area and the rainfall being normal there, the two reservoirs have just enough water to supply the city for four months.

If the two reservoirs do not receive further inflows hereafter, they will go dry after four months, leaving a drinking water deficit of 45 million gallons a day.

The city gets 345 MGD of water daily with 180 MGD being drawn from Krishna Phase-I and Phase-II and another 120 MGD from Singur and Manjira. About 45 MGD is drawn from Osman-sagar and Himayatsagar.

“About 80-100 MGD ground water is used by the city every day during summer. Even if Osman-sagar and Himayatsagar go dry by February, the shortage may not be felt that much due to the availability of groundwater,” said a senior official in the Water Board.

Next: More rains expected due to low pressure

More rains expected due to low pressure

Visakhapatnam: With the Southwest monsoon withdrawing, the temperatures have again shot up in the coastal districts. The highest maximum temperature of 37ºC was recorded at Rentachintala, Kavali and Nellore on Tuesday. Vizag recorded 34ºC on Wednesday. I

Meanwhile, the low-pressure area over Odisha now lies over south Chhattisgarh. Associated upper-air cyclonic circulation also extends up to mid-troposphere level.

MET department officials predict that heavy rains can lash isolated places in Srikakulam, Vizianagaram, Visakhapatnam, East and West Godavari, Adilabad, Karimnagar, Warangal, Khammam and Nalgonda during the next 48 hours.

Moderate to heavy rains may occur at many places in Srikakulam, Vizianagaram, Visakhapatnam, East and West Godavari and Telangana districts as well as a few places in the remaining coastal districts of the state.
 
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