Bore Wells Research Articles

Water Quality Index and Correlation Study for the Assessment of Water Quality and its Parameters of Yercaud Taluk, Salem District, Tamil Nadu, India

Groundwater samples of bore wells (BW), open wells (OW), Hand Pumps (HP), lakes, falls and streams collected from different locations in Yercaud Taluk in Salem District, Tamil Nadu were analyzed for their physicochemical characteristics. The ground water samples were studied during pre-monsoon (June-July 2010) and post-monsoon (December 2010-January 2011) seasons from 25 different villages. The present study was undertaken to characterize the physicochemical parameters such as temperature, pH, Total Alkalinity (TA), Electrical Conductivity (EC), salinity, Calcium Hardness (CH), Magnesium Hardness (MH), Total Hardness (TH), Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Total Solids (TS) and fluoride. Each parameter was compared with its standard permissible limit as prescribed by World Health Organization (WHO). The Water Quality Index (WQI) reflected that most of the samples are of good and excellent quality. The Karl Pearson Correlation matrix has approved the influence of CH on EC, Salinity and TDS with significantly positive correlation. The study reveals that all the villages have hardness within the desirable limit prescribed by WHO.

ASSESSMENT OF GROUNDWATER QUALITY FOR IRRIGATION USE

The availability of groundwater, namely fresh water is too less. This situation provokes the scientific community to further research in the field groundwater exploration of fresh water and natural recharge estimation, which are the most important components essential to formulate dependable groundwater management strategies in scarcity, affected regions. Hydrochemical studies were conducted in Chinnaeru river basin of Nalgonda District, Andhra Pradesh, India. Water samples from 28 locations were collected from bore wells during May 2011 and analyzed for different physico-chemical parameters. Based on various indices and water quality standards, the water is classified for safe drinking and irrigation uses. The concentration of fluoride in groundwater ranges from 0.4-2.9 mg/l. Piper diagram reflect that the water belong to Ca +2 –Mg +2 –HCO3 - to Na + –HCO3 - types. The Wilcox diagram suggests that most of the samples are within the permissible limits which can be used for irrigation. High fluoride content in groundwater can be attributed to the continuous water rock interaction during the process of percolation with fluorite bearing country rocks under arid, low precipitation and high evaporation conditions of the study area. The low calcium content in rocks and soils and the presence of high levels of sodium bicarbonate in soils and waters are important factors favouring high levels of fluoride in waters. The basement rocks provide abundant sources of fluoride in the form of amphibole, biotite, fluorite and apatite. The high fluoride concentration areas are demarcated and de-fluoride plant were installed to treat the water for safe drinking purposes. Index Terms: Groundwater, Bore wells, Wilcox diagram, Piper diagram, Fluoride content.

Assessment of bore wells water quality in Gwagwalada town of FCT

Bore wells water quality was carried out in Gwagwalada town of the Federal Capital Territory of Nigeria in December 2008. Acceptable standard method of sampling and analysis was used. Samples were collected from one bore well from the 11 part of the town. Wells were selected for the sample collections randomly. Sampling point locations and elevation were obtained using G.P.S. Analysis was carried out for Total Hardness, Turbidity, Sulphate, Calcium, Nitrate, Iron, PH, Chloride, Fluoride, TDS and Magnesium. Nitrate concentration was normal for all the samples points except for Ungwan Shanu and Ungwan Bassa. Turbidity, TDS and Magnesium for all the sampled wells are above the WHO permissible limit in all the location points. Hardness of water, Calcium and Chloride was found to be above the permissible level in Dagiri, Ungwan Dodo, Ungwan Shanu Ungwan Bassa, Kutunku, Abatoir and Ungwan Aguma. Other chemicals are found to be within the permissible limit. Key words: Ground water, water quality, pollution, concentration.

Transient Changes in Well-Water Level in Bore Wells in Western India Due to the 2004 Mw 9.3 Sumatra Earthquake

Large water level changes were observed in six bore wells in the Koyna region in western India following the Great Sumatra earthquake of M w 9.3 on 2004 December 26. This earthquake occurred at 00:58:50 coordinated universal time (UTC) off the coast of Sumatra located about 3000 km from the Koyna region. The arrival time of the P wave recorded at the Koyna seismic station was 01:04:24.45 (UTC). The anomalous water level changes were observed at 01:15 (UTC) at all of these wells where the sampling rate was 15 min. No abnormal changes were noticed in the preceding sampling time at 01:00 (UTC), clearly indicating that these changes occurred due to the passage of seismic waves generated by the Sumatra earthquake. However, due to the large sampling interval, it is difficult to correlate the water level changes either to shear or surface waves. No local earthquake was recorded by the network during this period. The anomalous water level changes were of the order of 2–65 cm and show either a spikelike or a steplike change. These types of changes are attributed to the dynamic strain induced by the passage of seismic waves, most probably long-period surface waves.

Pysico-Chemical Analysis of Bore Wells and Open Wells Drinking Water of, Kathalal Region

Physico-chemical analysis such as temperature, PH, dissolved oxygen, total dissolved solids, chloride, total alkalinity, calcium and magnesium hardness, sulphate, phosphate nitrate of bore wells water was carried out from twenty sampling station of kathalal territory area during the May-2011 in order to assess water quality index.

Selection of Appropriate Pumping Systems for Bore Wells in The Deccan Basalt of India

In India, groundwater resources from the hard-rock regions in general and from the Deccan Volcanic Province in particular are being obtained from 115-mm, 152-mm and 165-mm diameter bore holes (commonly known as bore wells). With no definite criteria for pump selection, these bore wells are either overdeveloped or underutilized, and the groundwater resources are thereby being mismanaged. PUMPS is a computer program that helps select a proper pumping system on a bore well in the Deccan basalt, taking into account the productivity of the bore well and considering a stabilized drawdown above the main aquifer tapped by the bore well. This method of pump selection has yielded encouraging results and all the bore wells with pumping systems installed using PUMPS have proven to be effective in providing the required yields without overstressing the aquifers.

A Positive Action Pump for Sampling Small Bore Wells

A Positive Action Pump for Sampling Small Bore Wells