Estimation of Hydrological Parameters from Geoelectrical Measurements [chapter]

Héctor José Peinado Guevara, Jaime Herrera Barrientos, Omar Delgado Rodríguez, Víctor Manuel Peinado Guevara, Omar Llanes Cárdenas, María Ladrón De Guevara Torres
2017 Electrical Resistivity and Conductivity  
In the coastal aquifer of the lowlands on the right side of the river Sinaloa there is need for fresh water for agricultural development since, around 15% of the water used in agricultural irrigation, is from underground sources. This situation is exacerbated in periods of drought, which promotes drilling with the risk of inding brackish water in them; besides, there is the risk of not meeting water demand due to low hydraulic transmissivity (T) of the aquifer, puting at risk the drilling costs
more » ... the drilling costs that this implies. In this sense, the determination of T and K (hydraulic conductivity) is important for the development and management of groundwater exploitation of the study area. Generally by means of pumping tests in wells, T is obtained, with high costs, so there are few values of T. K is generally obtained by wells and laboratory test. The aim of this chapter is to establish an empirical relationship between T and K with Dar-Zarrouk parameter in porous media, transverse resistance (T R ), in addition to a characterization of the water quality through the electrical resistivity. This parameter is estimated from surface resistivity measurements, which are more economical in relation to the pumping tests; thus, T was characterized in the study area. The coeicient of correlation of the exponential adjustment is 0.79 and the relation is T = 137185.7 T R 0.020758 − 156691 and K = 367.21 0.0548 − 518.813 with coeicient of correlation of 0.678. Niwas and Singhal [21] found analytic relationship between the parameters of Dar-Zarrouk and T as: T = (Kσ)T R and assuming that the product Kσ remains unchanged in areas with similar geological seting and water quality T = CT R . By knowing the value of this constant C, the T and K can be calculated by knowing T R . Ponzini et al. [8] found an empirical function between the transversal electrical resistance of an aquifer with its T. The shape of the relation between aquifer properties and geophysical parameters can be linear or non-linear [16] . The empirical function found is of the potential type of the form TR = AT M + B, where T R is transversal resistance, T the hydraulic transmissivity, and Electrical Resistivity and Conductivity 84
doi:10.5772/67990 fatcat:wc6afrffjvbb7p3nf5fycpkq2m