Pizometer ( DWLR ) With Telemetry Systems  

piezometers and their role in groundwater monitoring, especially as per the guidelines set by the Central Ground Water Board (CGWB).

What Is a Piezometer?

A piezometer is a specialized well or borehole designed to measure groundwater levels. It provides valuable information about the depth of water below the ground surface.

Piezometers are commonly used in hydrogeology, civil engineering, and environmental monitoring.

Purpose of Piezometers:

Monitoring Groundwater Levels: Piezometers allow us to track changes in groundwater levels over time. This information is crucial for water resource management.

Assessing Aquifer Behavior: By measuring water levels in piezometers, we gain insights into aquifer behavior, recharge rates, and seasonal variations.

Compliance with Regulations: Regulatory bodies like the CGWB mandate the installation of piezometers for groundwater withdrawal exceeding a certain threshold (e.g., 10,000 liters per day).

CGWB Guidelines for Piezometers:

Distance from Pumping Wells: Piezometers must be positioned at least 50 meters away from the pumping well where groundwater extraction occurs.

Diameter and Construction: The piezometer should have a diameter between 4 and 6 inches.

Data Recording: Regular data recording is essential to comply with government norms. The water level data collected from piezometers contribute to groundwater management strategies.

Digital Water Level Recorders (DWLR):

CGWB has initiated the use of Digital Water Level Recorders (DWLRs) with telemetry systems. These devices automatically record water levels at high frequencies.

The six-hourly water level data from DWLRs are transferred to a central server through the Water Information Management System (WIMS) maintained by the National Water Informatics Centre (NWIC).

NWIC also provides a web-based platform called India-WRIS for data sharing and dissemination.

Climate Response Monitoring Network (CRMN):

CGWB established the Climate Response Monitoring Network under the National Hydrology Project.

The CRMN focuses on ground water conditions, including quality, with special attention to seawater intrusion along coastal tracts in Tamil Nadu and the Union Territory of Puducherry.