Views: 34 Author: well drilling Publish Time: 2022-04-20 Origin: Site
How to accurately find groundwater resources, is the problem of each well drilling workers, who mastered the water finding skills, who will be able to seize the opportunity in the market, the following will give you 4 water finding tips to help you out of the big water, make a lot of money.
As a groundwater source, in terms of hydrogeology, generally need to have two basic conditions.
First, to have a water storage structure.
Second, there should be a proper source of recharge.
A water storage structure is like a container, without which no water can be contained, and without which no groundwater can be stored. However, if there is only a storage structure without a proper recharge source, then either there is no groundwater in the structure or the amount of groundwater is too limited to meet the application or to form a valuable groundwater source.
The basic task of finding groundwater is to find the storage structure and to determine its recharge conditions, determine and infer its water quantity, level and quality based on the factors that control groundwater.
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Storage structure plus other factors controlling groundwater, the problem is multifaceted, in the search for groundwater, in general, the following points should be considered in turn:
1、Define the requirements of the water source
Due to the different requirements of water quantity, water quality and water level, the storage structure and recharge conditions that need to be found are also different. So at the beginning of the work, the first thing to do is to clarify the task, to clarify the requirements of the use of the unit on the water source.
2、Understand the geological structure
The void of the rock is the place where the groundwater is stored, so in terms of hydrogeology, the lithology and geological structure of an area should first have a comprehensive understanding. There are many types of rocks, which can be broadly categorized into three types of rock formations: weakly permeable, permeable and strongly permeable.
In mountainous areas, topography controls the groundwater runoff conditions, and in plains, geomorphology controls the distribution of aquifers. Therefore, it is important to have a comprehensive analysis of the topography and geomorphology of an area.
Based on the understanding of lithology, geological structure, topography and geomorphology, combined with the outcropping and changes of springs and surface water, different hydrogeological units can be initially circled and further divided into groundwater recharge, runoff and drainage lots.
3、Search for water storage structure
On the basis of the above work, looking for the required water storage structure. Water storage structure is generally composed of a multi-gap rock layer conducive to groundwater collection, such as karsted limestone, multi-fractured sandstone, fracture fragmentation zone, flooded sand and pebble layer, alluvial sand and pebble layer, etc.. However, there are exceptions, such as mountainous areas composed mainly of limestone, where the limestone is highly permeable and the groundwater table is very deep, making it unsuitable for mining. In these places, it is necessary to look for weakly permeable strata, because the presence of these rock layers in the lot may keep some upper stagnant water.
4、Select the water extraction lot
According to the distribution of water storage structure and the need of water, choose the water extraction lot. Water extraction lot is generally close to the surface water system is appropriate, in the selected water extraction lot, can further according to the control of groundwater factors, reference to other similar areas of some hydrogeological information and take the necessary means of exploration, infer and determine the water extraction lot of water, water level and water quality.