Estimation of recharge to the phreatic aquifers of the Lower Maner Basin, India, by using the titrium injection method

a b s t r a c tStudy focus: Groundwater is of strategic importance. The accurate estimation of groundwater recharge and assessing the fundamental controlling factors are therefore of utmost importance to protect groundwater systems. We used the spatially-distributed waterbalance model WetSpass to estimate long-term average recharge in Flanders. We validated recharge rates with base flow estimates of 67 daily stream flow records using the hydrograph analyses. To this end we performed principal component analysis, multiple linear regression analysis and relative importance analysis to assess the controlling factors of the spatial variation of recharge and base flow with the influencing watershed characteristics. New hydrological insights for the region: The average resulting recharge is 235 mm/year and occurs mainly in winter. The overall moderate correlation between base flow estimates and modeled recharge rates indicates that base flow is a reasonable proxy of recharge. Groundwater recharge variation was explained in order of importance by precipitation, soil texture and vegetation cover; while base flow variation was strongly controlled by vegetation cover and groundwater depth. The results of this study highlight the important role of spatial variables in estimation of recharge and base flow. In addition, the prominent role of vegetation makes clear the potential importance of land-use changes on recharge and hence the need to include a proper strategy for land-use change in sustainable management of groundwater resources.

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“…These results are in accordance with the results of Athavale et al (1980), Kennett-Smith et al (1994), and Kim and Jackson (2012).…”

Section: Relative Importance Analysissupporting

confidence: 92%

Spatial distribution of groundwater recharge and base flow: Assessment of controlling factors

Zomlot

Verbeiren

Huysmans

et al. 2015

Journal of Hydrology: Regional Studies

118

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“…We found that the moisture ET In India we generally carry out the tritium injections in the study area, just before the onset of the monsoon precipitation, and collect the soil profiles from the injection sites after cessation of the monsoon and in the month of May/June, before onset of next year's monsoon. We have compared the moisture flux/natural recharge values obtained by using the tritium method with those obtained by using hydrometeorological and hydrogeological methods and found a good agreement [Athavale et al, 1980[Athavale et al, , 1983. The experimental error in tritium injection method was determined as +_ 10%.…”

Section: Description Of the Study Areamentioning

confidence: 87%

Influx and efflux of moisture in a desert soil during a 1 year period

Athavale¹,

Rangarajan²,

Muralidharan³

1998

Water Resources Research

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Abstract. Spatial and temporal variation of moisture flux in soil over a 1 year period was studied in the Thar desert of India. Tritium was injected at a depth of 0.8 m at 18 sites distributed over an area of 50 km 2 and at 20 adjacent points at a single site over a sand dune, before the 1994 monsoon. Vertical soil profiles were collected from the 18 sites after the end of monsoon and at the end of the year and from the multiple-injections site at different time intervals throughout the year. Moisture flux values, computed from tritium and moisture distribution in soil profiles, show that the moisture influx at a site depends upon the grain size of the top 20 cm layer and that about 68% of the total influx of water below the injection depth is lost during the summer months. The data for the multiple-injections site show that the tritium spike was displaced to a depth of 4 m by the end of the monsoon, and it remained stationary during the postmonsoon period of 8 months, although about 64% of the soil moisture was lost. The spiked layer showed enrichment in the specific activity of tritium during summer months. These observations suggest that vapor diffusion is the dominant process for moisture loss from the Thar desert soil. The net input (natural recharge) to groundwater due to 1994 precipitation was 62 mm. IntroductionThe

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“…Injected tritium tracer technique (Munnich 1968;Athavale et al 1980;Rangarajan and Athavale 2000) based on the model on layered movement of water infiltration in the vadoze zone was used for natural recharge (recharge caused by rainfall) measurements in the watershed area. In the study area, measurements were made at 10 sites for estimating natural recharge caused by 2006 seasonal rainfall (figure 4).…”

Section: Tritium Injection Methodsmentioning

confidence: 99%

Aquifer characteristics and its modeling around an industrial complex, Tuticorin, Tamil Nadu, India: A case study

2009

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Anthropogenic pollution of shallow groundwater resources due to industrial activities is becoming a cause of concern in the east coastal belt of the state of Tamil Nadu, India. Integrated hydrogeological, geophysical and tracer studies were carried out in the coastal region encompassing an industrial complex. The objective has been to gain knowledge of aquifer characteristics, ascertaining groundwater movement and its flow direction, which would in turn reveal the possibility of contamination of groundwater regime and its better management. The results of multi-parameters and model study indicate that the velocity of groundwater flow ranges from 0.013 m/d to 0.22 m/d in and around the industrial complex in upstream western part of the catchment and 0.026 m/d to 0.054 m/d in the downstream eastern part, near the coast. These parameters are vital for the development of groundwater management scheme.

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Estimation of recharge to the phreatic aquifers of the Lower Maner Basin, India, by using the titrium injection method

Cited by 49 publications

References 1 publication

Spatial distribution of groundwater recharge and base flow: Assessment of controlling factors

Spatial distribution of groundwater recharge and base flow: Assessment of controlling factors

Influx and efflux of moisture in a desert soil during a 1 year period

Aquifer characteristics and its modeling around an industrial complex, Tuticorin, Tamil Nadu, India: A case study

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