The proposal is an in-depth study of the geo-morphological setup of the area; there are also findings on geology and hydrology and the area's climate and rainfall and groundwater resources.
The final proposal is based on these findings and consists of a series of diagrams that not only suggest the design of various recharge structures but also their placements around the hotel site.
The report is structured into 10 chapters which are -
- Introduction
- Geo-morphological setup
- Climate and rainfall
- Geology and hydrology
- Geophysical investigations
- Hydro-chemistry
- Groundwater resources
- Groundwater development and design
- Management strategies
- Summary and recommendations
It provides a step by step process that not only gives information on the method required to determine the sources of water, but also the type of recharge structures that are most suited for a particular area.
Introduction
Jaipur, the area, where the hotel is proposed is a water stressed area. This is not only because of rapid urbanisation but also because of it being in an arid zone.Thus the hotel will need to tap groundwater. The objective of this report is to assess the availability of groundwater resources, suggest designs for recharge structures and provide a scientific groundwater management plan.
Geo-morphological setup
The study of the geo-morphology of the area finds that the area consists of sandy plains, hills and inter-mountain valleys. As the project site is in an arid area, there is not much development of natural river drainage systems. However, there is a stream called Amanishah Nalla near the site. Remote sensing and GIS systems are used to determine water occurrence in the form of streams etc, and also to study the parameters that could indicate the groundwater regime.
Climate, rainfall, geology, hydrology
The study of climate and rainfall indicates that the average annual rainfall around Jaipur city was 503.25 mm. This section has a variety of forms of information which include figures and data tables which include national climatic map of India, yearly variation in rainfall etc. There is also an isohyetal map of the area. Studies of geology of the area, are made along with investigations on its geophysical properties and hydro-chemistry.
Groundwater resources
According to a report from the Central Ground Water Board, Jaipur district has 60925 hectare-meter net annual groundwater availability. However, the rate of groundwater extraction is very high, it has reached 187%. A table provides water levels and development for different blocks in Jaipur district.
Groundwater development and design
Besides suggesting the locations for the digging of wells, the chapter on groundwater development and well design gives information on water requirement of the project and the yield from each well. This estimation has been made on the basis of information collected from test wells dug in the area.
The manner of construction of wells, their drawings and the type of technology to be used are also provided; it is suggested that a combination rig (Rotary cum DTH rig) be used for constructions of tube wells. A chart detailing the positions of the wells and their depths with expected yield is provided.
Management strategies
A number of suggestions for artificial recharge, rainwater harvesting systems are also made. These suggestions are made on the computation of water available for recharge. Run-off from different areas at the site is provided in a table; these include roof-tops, roads, open and green land etc.
Depending on run-off available, the type of recharge structure that can be constructed is suggested. The position of these structures is given through a diagram. Other diagrams give the design for these structures. Systems required for water reuse and recycling are also discussed here.
Summary and recommendations
The fact that there is a dire need for groundwater recharging cannot be sufficiently stressed. However, to ensure that efforts for ground water recharge are met with success there is need for a scientific approach. This document provides the necessary information on the steps required before implementing a groundwater recharge system.
Download the report here: