Surficial cristalline fratured-rock aquifers (with bare surface) are more exposed to evaporation than shallow fractured-rock aquifers covered with soil. Also, groundwater potential (related to recharge) is particularly localized and discontinuous in fractured-rock aquifers depending on its structural features (fault, fracture, joint networks).

Thanks Dr. Chesnaux for your answer

Well,

depend on:

Geographic Location(Easting and Northing)

Climate zone

Shallow or deep groundwater level

The presence or absence of natural plant (agricultural or urban)

Sincerely

Many thanks Bayan Hussien for your answer. The area lies within the tropical rain forest and composed of mountain ranges and depressions with thick vegetation. The rocks are predominantly gneissic and few successful boreholes derive their water from fractures and joints. Aquifer depths vary between 30 and 50 m. The weathered layers are not thick enough as to sustain hand dug wells utilized by the rural people in the dry season due to water loss through evaporation.

Is there a model to determine the amount of water that evaporates leading to such water loss by aquifer conduits?

Well,

Here, you need to carry out a project titled Estimation of evaporation within the region of the abovementioned condition using water balance technique.

Yours Sincerely

Many thanks Hussien, I really do appreciate. Cheers

Good question.......i agree with Romain Chesnaux Answer......................