Method for governing deserts by utilizing modified sand

Abstract

The invention discloses a method for governing deserts by utilizing modified sand. The modified sand is paved on the surface of a desert to be governed, and is formed by dissolving a water-soluble solid organic matter in water to form a cohesive and adhesive solution, and mixing the cohesive and adhesive solution with sand; after moisture evaporates, the water-soluble solid organic matter can bond sand, and can be dissolved in water again after meeting water to form the cohesive and adhesive solution to bond sand. According to the invention, common sand can serve as soil; the interaction among sand grains is changed fundamentally; a particle pore structure with binding force (sticking force) is formed; after repeated evaporation and wetting, materials cannot run off easily due to the cohesive and adhesive properties, and the modified sand can be as stable as soil, and can store water and nutrients as soil. Therefore, the method provides a solid condition for tree growth, and is an ideal desert governing measure.

Description

technical field [0001] The invention relates to the fields of utilization of sand resources and control of deserts and desertification, in particular to a method for controlling deserts by using modified sand bodies with soil properties. Background technique [0002] (1) Desert, desertification and its hazards [0003] Deserts and desertification are the most serious major environmental problems facing mankind today. [0004] The land area of ​​the world is 162 million square kilometers, accounting for 30.3% of the total earth area, of which about 1 / 3 (48 million square kilometers) is arid and semi-arid desert areas, and it is expanding at a rate of 40,000 to 60,000 square kilometers every year. . The desert area has accounted for 10% of the total land area, and 43% of the land is facing the threat of desertification. [0005] my country is one of the countries with the most deserts in the world, and it is also one of the countries seriously endangered by sandstorms and d...

AI Technical Summary

Problems solved by technology

However, emulsified asphalt also exists during use because the asphaltene and resin in the asphalt are easily destroyed by oxygen, light, heat, moisture and microorganisms in the atmosphere, and the oil content decreases.

The gradual intensification of this change will lead to the deterioration of asphalt performance, such as the increase of softening point, the decrease of penetration, and the decrease of elongation, so that the united layer gradually becomes brittle, hard, loses plasticity, ages, and eventually cracks and dies. Destroyed by wind erosion, losing sand-fixing effect

[0021] (3) Fundamental difficulties and existing problems in desert and desertification control

However, the sand bodies in the desert are discrete particles, and the fundamental difficulty in desert governance is that the sand bodies in the desert are easy to move, difficult to retain water and store nutrients

Based on the current sand control measures, it is not difficult to find that the existing desert control methods are far from fundamentally solving the two problems of easy movement of the desert and difficulty in water retention and storage of nutrients.

[0023] The existing desert control method is mainly based on sand fixation, regardless of engineering (mechanical) measures, plant measures and chemical measures, it does not start from improving the properties of the desert sand itself, but only avoids the harm caused by the movement of sand bodies. From the point of view of its methods and methods, it is still a passive sand control, which can overcome the fluidity problem of the desert to a certain extent or in a short period of time, but it is difficult to fundamentally solve the difficult problem of water conservation and storage in the desert, and it is difficult to store nutrients. The hoped "desert into oasis" is still far away

[0024] ①Engineering (mechanical) measures can temporarily change the physical form (natural existence) of the desert. It is a temporary sand prevention measure. For the hazards of quicksand, it only plays the role of sand-fixing and "curing the surface", and the desert is temporarily tamed , cannot achieve the effect of "curing the root cause", after a long time, the desert will still return to its original appearance

[0029] Plant sand fixation uses the upper part of the plant to block and block sand, and uses the root of the plant to fix sand, which can change the microclimate and microsoil environment to a certain extent. However, the fundamental difficulty of plant sand fixation is that the desert itself is not conducive to plant growth, such as the desert is unstable and sandstorms Frequent exercise, barren desert, insufficient water and difficulty in water retention and temperature regulation all have adverse effects on plants

[0030] Wind and sand movement can cause plants to be harmed by blowing erosion, sand burial and sand cutting. The wind and sand movement can be solved by engineering protection measures and chemical sand fixation. However, the fundamental problem of insufficient water in the desert and difficulty in water retention limits the applicability of traditional plant sand fixation. extremely restrictive