In the past, monitoring of soil moisture mainly depended on manpower, and there were few monitoring points and poor representation, which could not meet the actual needs of production. Therefore, in recent years, many relevant units at home and abroad have studied the use of satellite remote sensing methods to develop soil moisture and drought management systems and achieved good results. In general, the greater the soil moisture content, the larger the soil heat capacity, the greater the change in the soil heat inertia to a certain extent reflect the change in heat capacity. Therefore, the size of the soil heat inertia can reflect the status of soil moisture content, and the soil thermal inertia It is related to the change of the ground temperature.
Bare land in the same area does not consider the influence of other factors. The pixel points of the same soil moisture. The difference in surface temperature should also be the same. However, the surface temperature difference measured by the soil moisture content and the drought management system is different. Apart from other factors, its geographical location is an important factor. In general, the temperature difference between the surface and the inland gradually increases. Therefore, in the peninsula area, the relationship between soil moisture and surface temperature difference is not obvious.
In general, the temperature difference in the eastern coastal areas is much smaller than that in the western region under the same relative soil moisture conditions. If the whole province is considered as a region, the accuracy of the established soil moisture and ΔT model is not high. Therefore, before establishing the relationship between soil moisture and temperature difference, the surface temperature difference data obtained by the soil moisture and drought management system must be corrected in order to improve the accuracy of the model.
Hexagonal mesh is a wire mesh made of angular mesh (hexagonal) woven with metal wires. The diameter of the metal wire used varies according to the size of the hexagon.
The metal wires are twisted into a hexagonal shape, and the wires on the edge of the outer frame can be made into single-sided, double-sided, or movable edge wires.
Hexagonal mesh has good flexibility and corrosion resistance and is widely used as gabion mesh to protect slopes.
According to different uses, hexagonal mesh can be divided into chicken wire mesh and slope protection mesh (or gabion mesh). The former has a smaller mesh, while the latter has a much larger mesh.
Breeding fence,farm fence,chicken farm fence,cattle farm fence
Anping County Dongjie Wiremesh Products Co., Ltd. , https://www.dongjiewire.com