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Water works: Keystone’s interventions in the Nilgiris
A village of nine families bounded by a river on one side and thick forests on the other, lived here in Kilcoupe, an Irula hamlet in the Nilgiris. The women went out into the forest in search of water, a risky activity, as there was quite a large chance that they would encounter either a gaur or an elephant, sometimes even a leopard.
bala  posted 5 years 4 months ago
Articles

My experience with e-learning courses
The Internet and mobile revolutions have combined to give birth to whole new generations of tools that put skills that were squarely in the domain of specialists a decade ago, in the hands of laypersons and amateurs.
bala  posted 5 years 6 months ago
Articles

A peak at the future: Simulating Coonoor’s water situation
The Nilgiris have undergone an incredible amount of change in the last 10 years. Coonoor, an area well endowed with natural resources, is the second largest tourist destination here. However, over the last year (2012-13), the town has been reeling under a water crisis [1].
bala  posted 5 years 8 months ago
Articles

Tips for working with spreadsheets

bala  posted 5 years 8 months ago
Articles

Water and livelihoods in the Nilgiris – Part II

bala  posted 5 years 10 months ago
Articles

Water and livelihoods in the Nilgiris - Part I

bala  posted 5 years 10 months ago
Questions

I want to implement RWH at home and use the water for flushing toilets. What filter would be appropriate?
Since the rainwater is to be used for toilet flushing purpose only there is no need for any filter. The roof needs to be kept reasonably clean that’s all. If necessary a grating can be fixed at the inlet point to the loft from the roof.
bala  posted 7 years 1 month ago
Questions

Double pits collect sewage water from a house with no drainage. Can a borewell located 15 ft from the pits be contaminated?
Contamination depends on, how the bore well is constructed. If the bore well is provided with deep casing pipe and the static water level is much deeper and the gap between the bore well casing and annular space is grouted with clay or cement then the possibility is very very less or nil.
bala  posted 7 years 1 month ago
Questions

A GI pipe conveys water from an RCC tank at ground level to an overhead tank. The pipe rusted in 6 months. What's the reason?
Water being acidic is one of the major reasons for the rusting/corrosion of the GI pipe. GI is no longer the most suitable material for water. Plastics like PVS/HDPE/PP are the current materials for pipes. They are inert and do not corrode or rust. It is advisable to change from GI or mild steel, if it is also used, to one of these plastics.
bala  posted 7 years 1 month ago
Questions

A borewell dug in Bangalore expecting water at 800 ft only found rock till 1000 ft. Is there any hope of getting water from it?
A dry bore well during drilling can be water bearing after some time. You may check whether this has happened to your dry bore well.
bala  posted 7 years 1 month ago
Questions

Our borewell has suddenly dropped in yield. There are lots of other borewells in the neighbourhood. What can we do?
To enhance yield in the bore well, you can opt for multi hydro-fracturing methodology, as it looks like your bore well is surrounded by fractured zones at deeper levels.
bala  posted 7 years 1 month ago
Questions

The quality of water in a borewell is good in summer but degrades immediately after rains. Any treatment measures possible?
Well water becoming bad with lather and foul smell in every rainy season but turning good in other seasons indicates poor construction quality of the bore well.
bala  posted 7 years 1 month ago
Questions

The water yield from a 10 year old borewell has reduced considerably. Lowering the pump has not helped. What can be done?
The static water level in the borewell has gone down considerably. The low H.P submersible pump is unable to lift the water from present deeper depth into your over head tank. As such please first ascertain the static water level and get details of draw down (water level after carrying out pumping for an hour or two, in your case).
bala  posted 7 years 1 month ago
Questions

What steps can we take in case of silting of borewell?
It is clear that well development and construction was not done properly. A professional driller prepares litholog,time log and variation in the hammer sound and decides about insertion of blank and slotted casing pipe. This practice was in vogue, even when drilling has been carried out in hard rock terrain.
bala  posted 7 years 1 month ago
Questions

What are UPVC Pipes and how reliable and cost-effective are they?
As it is difficult to make extrusions using polyvinyl chloride (PVC), it becomes necessary to add plasticizers to make the compound pliable. As plasticized PVC is dense, brittle and susceptible to cracking, unplasticized PVC (UPVC) was invented by adding certain other additives which protect it from weathering and impart high impact strength.
bala  posted 7 years 1 month ago
Questions

How to calculate HP of submersible pump for a particular application and what all factors should be taken into consideration?
Every pump manufacturer provides a Head-Capacity curve or a Table that says how much water to expect from what depth for a given HP and efficiency range. Obviously deeper one installs a pump, less water it pumps. Please note that higher the HP one uses does not mean that more water is pumped out.
bala  posted 7 years 1 month ago
Questions

While drilling a borewell water gushed out of a nearby borewell. Now there is no water coming from the new well. Any suggestion?
Try to drop a small pebble (glass marble) , approximately 5 mm in diameter and measure the amount of time it takes to touch the water. The thumb rule is about 15 ft per second hence if water is at around 90 ft, it should take 6 seconds to strike water. The sound would be loud and audible on surface.
bala  posted 7 years 1 month ago
Questions

What is hydrofracturing and when is it useful?
Hydrofracturing is a well development process that involves injecting water under high pressure into a bedrock formation via the well.
bala  posted 7 years 1 month ago
Questions

What is videographing used for?
Video graph or camera test is useful only to ascertain the type of formation and sequences of the strata encountered. Video testing can be done in the water column to analyse and reassess the formation details. It is used in problematic wells to find out the cracks and fractures and its depth, so as to ascertain the packer installation depths for hydro fracturing or blasting.
bala  posted 7 years 1 month ago

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