Geoscience Reference
In-Depth Information
have been of considerable interest to scientists and engineers who designed the Geo-
Information Monitoring System of Agricultural Function (GIMSAF).
Microwave radiometric technique for measuring soil moisture characteristics
have been developed and widely used in many regions by Shutko et al. (2010). This
experience was used in the GIMSAF to
find a procedure to determine the water
content and moisture pro
les in soil layers a meter thick and without vegetation
cover by means of remote sensing. The procedure is based on the dependence of
microwave emissivity of soil on its moisture. The procedure takes into account the
variations of temperature, density and roughness of natural soils.
The GIMSAF performs:
collection of information pertaining to the current parameters of the soil-vege-
tation system (moisture, shallow water table, soil salinity, biomass of the veg-
etation) over regions of various area;
processing of the information above within the framework of a model simulating
the biogeocenotic, physical and chemical processes in the soil-vegetation system
with the aim of evaluating its current state and predicting its development and
potential productivity;
represents current and predicted information as a schematic maps with spatio-
temporal detailing within a controlled structure;
making technological decisions that are optimum from the point of view of
providing the maximal biological productivity of agriculture vegetation;
The GIMSAF structure includes units of:
collection of information;
initial information processing and accumulation of data for simulating the
agricultural vegetation productivity and water conditions;
predicting the geosystem state;
evaluation of the disparity between the measured and predicted trends in the
geosystem processes;
making decision pertaining to the measurement scheduling and geosystem
controlling;
service support in operation with input and output data.
The data collection unit is based on remotely sensed data and prior knowledge of
the state of an object and meteorological parameters. Remote pickups switch on a
microwave radiometric complex provided with computer programs that permit to
obtain operational area information at the desired degree of detailing concerning the
soil moisture content to a depth of 0
-
100 cm, the subsoil water level to a depth of
90 g L 1 , the vegetation
biomass, the degree of mineralization and contamination in reservoirs. Moisture
measurement operating range is 0.0
0
-
3 m, the salt concentration of the soil in a range of 3
-
0.6 g cm 3 with maximal absolute error
equaled to the vegetation biomass less and more 200 t ha 1
-
to 0.05 and 0.05
-
0.08 g cm 3 , respectively.
The operation of the information processing units is based on a computer program
package providing spatio-temporal interpolation of remote trace measurements and
Search WWH ::




Custom Search