The concept of groundwater resources and the classification of groundwater resources

Groundwater is very scarce, so it is a rare environmental resource, and its catastrophic is the groundwater inrush disaster.

Ground water refers to the water deposited in the rock voids below the ground, and in a narrow sense, it refers to the water in the saturated aquifer below the groundwater surface. In the national standard "Hydrogeological Terminology" (GB T 14157-93), groundwater refers to gravity water buried below the surface in various forms before altitude.

Foreign scholars recognize that there are three definitions of groundwater: one refers to all the water buried in groundwater that is significantly different from surface water, especially the part of the water in the saturated zone of the aquifer; the second is to flow downwards or infiltrate to saturate the soil and rocks and replenish water from springs and wells; The third is the water stored in the rocky cavities in the ground, in the voids that make up the earth's crustal material.

Summary. Hello dear, I am happy to answer for you, the difference between groundwater and groundwater resources is: groundwater refers to the amount of fresh water in surface water that can be renewed year by year.

Including ice and snow water, river water, lake and marsh water, etc. The amount is usually expressed in terms of the amount of natural river runoff after restoration. Groundwater Resources:

It refers to the amount of groundwater fresh water that can be provided for human use within a certain period of time and can be restored year by year. Groundwater storage and recharge are composed.

Hello dear, I am happy to answer for you, the difference between groundwater and groundwater resources is: groundwater refers to the amount of fresh water in surface water that can be renewed year by year. Including ice and snow water, river water, lake and marsh water, etc.

The amount of the manuscript is usually expressed in terms of the amount of natural river runoff after restoration. Groundwater resources: refers to the amount of groundwater fresh water that can be provided for human use within a certain period of time and can be carefully restored year by year.

The amount of groundwater stored and recharged is composed of a simple and filial piety.

Characteristics of groundwater: slower flow. The water quality parameters change slowly, once the pollution is very acorn, it is difficult to recover, the burial depth is different, and the temperature change law is also different.

The water quality condition is susceptible to change after removal. The authenticity of the water sample will be affected due to adsorption or contamination of the water collector and loss of resistance of certain components.

In addition to the extremely high salt content of the source ocean in the sea state, the surface water is closed. Other surface waters have low salt content. The hardness is lower as compared to groundwater. Compared to groundwater. Surface water has a high level of contaminant deficits.

What is the basis for the classification of groundwater? What types of groundwater are there? How to distinguish the difference between groundwater, and what is the difference between water in our daily life, in order to let more people understand and learn knowledge, I will bring you the basis for groundwater classification.

Groundwater refers to the water that exists in the voids of rocks below the ground, and in a narrow sense, it refers to the water in the saturated aquifer below the surface of the groundwater. Classification is based on a certain characteristic of groundwater and a combination of several characteristics of groundwater.

There are three ways to classify it:

1. According to different origins, groundwater can be divided into infiltration water, condensate water, primary water and buried water.

2. According to the degree of mineralization, it can be divided into fresh water, brackish water, brackish water, salt water and brine.

3. According to the nature of the aquifer, it can be divided into pore water, fracture water and karst water.

4. According to different burial conditions, it can be divided into upper stagnant water, diving, and confined water. Everyone knows that water is the source of life, and everyone should take care of the water environment.

Foreign scholars believe that there are three definitions of groundwater:

One refers to all the water buried in groundwater that is significantly different from surface water, especially the part of the water in the saturated zone of the aquifer;

the second is to flow downwards or infiltrate to saturate the soil and rocks and replenish water from springs and wells;

The third is the water stored in the rocky cavities in the ground, in the voids that make up the earth's crustal material. The groundwater temperature varies with the natural geographical environment, geological conditions and circulation depth. Groundwater temperature is not affected by solar radiation, the depth of the constant temperature zone in different latitudes is different, the water temperature is different, I have been in most areas, the temperature range of underground groundwater is 10-22.

The specific groundwater temperature will increase with the increase of depth, and the increase depends on the geothermal warming rate of different regions and lithologies. So much so that there are hot springs, there are geothermal heat, etc.

When it comes to groundwater, everyone is certainly familiar with it. After all, the water we usually talk about drinking is generally groundwater. Especially the friends who live in the countryside, in fact, they all dig a well and live on it.

Do you know how groundwater is formed? How is groundwater formedGroundwater is mainly used for atmospheric precipitation and surface water infiltration recharge; At the same time, rivers, lakes and swamps are fed by underground seepage, or directly into the ocean; The water in the upper soil is evaporated or absorbed by plant roots and then dispersed into the air and returned to the atmosphere, thus actively participating in the water cycle on the earth, as well as the processes of dissolution, landslides, and soil salinization that occur on the earth. Groundwater is an important part of water resources, and it is one of the important water sources for agricultural irrigation, industrial and mining and urban areas due to its stable water volume and good water quality.

However, under certain conditions, changes in groundwater will also cause unfavorable natural phenomena such as swamping, salinization, landslides, and land subsidence.

Ground water refers to the water that exists in the rock voids below the ground, and in a narrow sense, it refers to the water in the saturated aquifer below the groundwater surface.

In the national standard "Hydrogeological Terminology" (GB T 14157-93), groundwater refers to various forms of gravity water buried below the surface.

Groundwater resources: refers to the dynamic water volume of underground saturated aquifers, that is, the amount of groundwater recharge caused by precipitation and surface water infiltration.

According to the different underground burial conditions, groundwater can be divided into three categories: upper stagnant water, diving water and confined water.

Upper stagnant water: It is a water storage body formed by local water insulation, which makes the infiltrated atmospheric precipitation stay in shallow rock cracks or sedimentary layers.

Diving is groundwater buried in the first stable aquifer below the surface, and most of the groundwater commonly seen is submersible. Springs are formed when groundwater flows out of the ground. Diving exists on top of the first stable aquifer below the surface, with the gravitational force of free water.

It is mainly recharged by precipitation and surface water infiltration.

Confined water (artesian water) is groundwater that is deeply buried and occurs between two aquifers. Confined water fills the water in the aquifer between the upper and lower aquifers. It is subjected to pressure, and when the overlying aquifer is chiseled through, water can rise or eject from the borehole.