USE OF SUCTION LYSIMETERS TO MONITOR VADOSE ZONE GROUNDWATER QUALITY AT A WASTEWATER LAND APPLICATION FACILITY

2013 ◽  
Author(s):  
M. Anderson
Keyword(s):  
Groundwater Quality ◽  
Vadose Zone ◽  
Land Application ◽  
Suction Lysimeters

Nitrate transport in the chalk vadose zone in in Picardy (France)

2021 ◽  
pp. SP517-2020-164
Author(s):  
N. Surdyk ◽  
L. Gourcy ◽  
V. Bault ◽  
N. Baran
Keyword(s):  
Groundwater Quality ◽  
Vadose Zone ◽  
Nitrate Concentration ◽  
Agricultural Practices ◽  
Nitrate Transport ◽  
Transport Time ◽  
Major Question ◽  
Noticeable Effect ◽  
Fertiliser Application ◽  
The Impact

AbstractSince the 1980s, nitrate has been shown to be present in soils and the vadose zone of various types of geological materials years after fertiliser application. In chalk where the vadose zone is thick, nitrate storage can be considerable and its transport time toward groundwater can be lengthy.In this context, evaluation of the impact of changes in agricultural practices on groundwater quality remains a major question. Improvement of groundwater quality can in certain cases be greatly delayed after the implementation of environmental agricultural practices.The principal objective of this study is to improve our knowledge of when changes in agricultural practices will have a noticeable effect on groundwater quality.To meet this objective, nitrate concentration profiles were performed in agricultural plots in Picardy (France). A crop marker event was used to calculate the transport velocity of water and associated solutes. This method is useful when other tracers (as tritium or chlorine) cannot be used. Estimated velocities range from 0.51 to 0.54 m/year; these values are similar to those described in similar chalk aquifers.

scholarly journals Assessment Of The Protective Capacity Of Vadoze Zone Over Aquifer Systems Using Secondary Geoelectrical Parameters: A Case Study Of Kaltungo Area North East, Nigeria

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
E.Y. Mbiimbe ◽  
I.B. Goni ◽  
J.M. El-Nafaty ◽  
A.U. Yuguda
Keyword(s):  
Groundwater Quality ◽  
Vadose Zone ◽  
Computer Software ◽  
Mean Value ◽  
Primary Data ◽  
Protective Capacity ◽  
North East ◽  
Transverse Resistance ◽  
Aquifer Systems ◽  
Vadoze Zone

An assessment of the protective capacity of the vadose zone overlying the aquifer systems in the Kaltungo area was carried out to determine its influence on groundwater quality. Applying the schlumberger array with a maximum electrode spread AB/2 = 100m through VES, thirty water well points were surveyed using  Omega terrameter (PIOSO1) resistivity meter. The field data was first subjected to manual interpretation through curve marching and then digitized modeled curves using computer software. The interpreted data revealed that the area is characterized by eleven different curve types representing three to five geo electrical layers. In order to assess the protective capacity of the vadoze zone over the aquifer systems, the longitudinal conductance (S) and transverse resistance (T) (secondary geoelectric parameters) were computed from the primary data using the Dar Zarouk formula. The values of S obtained range from 0.0018 to 0.4056 ohms with a mean value of 0.0135 ohms while the values of T range from 0.55 ohms to 1195.68 ohms with a mean value of 39.84 ohms. The values of S and T obtained reveal that 90% of probed points has poor protective capacity, 10 % has moderate protective capacity and 83 % has high transmissivity, 17 % has intermediate transmissivity. The T and S values are skewed towards poorly protective capacity thus making groundwater in the area highly vulnerable to contamination from the surface. To achieve good groundwater quality in the area, proper completion of newly constructed wells should install protective casing through the entire vadose zone.

IMPACT OF BIOSOLIDS LAND APPLICATION ON GROUNDWATER QUALITY

2004 ◽  
Vol 2004 (1) ◽  
pp. 815-836
Author(s):  
H.H.J. Cox ◽  
R. Iranpour ◽  
F. Alatriste-Mondragon ◽  
S. Oh ◽  
E. Alloh ◽  
...  
Keyword(s):  
Groundwater Quality ◽  
Land Application

Groundwater quality protection at biosolids land application sites

2012 ◽  
Vol 46 (18) ◽  
pp. 5963-5969 ◽  
Author(s):  
Michael J. McFarland ◽  
Karthik Kumarsamy ◽  
Robert B. Brobst ◽  
Alan Hais ◽  
Mark D. Schmitz
Keyword(s):  
Groundwater Quality ◽  
Land Application
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