Analysis and Comparison of the Wells in the Pleasant Valley Area of Ventura County   -   6

5.2   Calculation of Specific Capacity per foot of Well Screen

The analysis consisted of first estimating the Hydraulic conductivity in the vicinity of each well knowing the specific capacity (Q/s), and Transmissivity (K b).

Once the constant "beta" was determined, specific capacities for different lengths of well screens were calculated. Specific capacities for the following three screen lengths were chosen for comparison:

1. 1 ft
2. 500 ft
3. 1000 ft

The specific capacities for each of the 3 screen lengths can be seen in the far right-hand columns of Figure 7.

The calculated specific capacities for the various screen lengths have been sorted from highest to lowest. As can be seen in the figure, the sorted specific capacities do not show any apparent relationship between well screen type and specific capacity (ie. Screens with the highest percentage open area do not have the highest specific capacities).

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