Method and device for estimating ecological underground water level in arid plain areas

Abstract

The invention provides a method and device for estimating the ecological underground water level of an arid plain area. The method comprises the steps: constructing typical quadrat division on the arid plain area to be studied, and obtaining environmental factors; constructing a land surface vegetation coverage remote sensing quantitative inversion model according to the satellite remote sensing image data and the environmental elements in the historical period of the arid plain area to be studied; extracting satellite remote sensing image data of a target point in the arid plain area to be studied in each historical period, and performing vegetation coverage inversion by utilizing the constructed land surface vegetation coverage remote sensing quantitative inversion model to obtain vegetation coverage of the target point in the historical period; and collecting the underground water burial depth of the target point in the corresponding historical period, establishing a relationship between the vegetation coverage of the target point and the underground water burial depth according to the underground water burial depth in the same historical period and the vegetation coverage obtained by inversion, and determining the ecological underground water level of the target point according to the established relationship. The estimation precision of the ecological underground water level in the arid plain area can be improved.

Description

technical field [0001] The invention relates to the technical field of coordinating groundwater ecological functions and resource functions in ecohydrology, in particular to a method and device for estimating ecological groundwater levels in arid plain areas. Background technique [0002] The arid areas in my country are widely distributed and the rainfall is scarce. For arid areas, the natural vegetation in these areas is highly dependent on groundwater, and the level of groundwater levels controls the distribution pattern and vegetation coverage of vegetation populations in this area. For the vegetation populations in these areas, each vegetation population has its corresponding groundwater table (groundwater depth) to maintain the growth and reproduction of the vegetation population. The groundwater depth is called the ecological environment of the vegetation population. water table. [0003] Groundwater not only provides water resources for the ecological environment in...

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Problems solved by technology

However, since the ecological groundwater level is affected by factors such as climate, soil, groundwater, and biological communities, the ecological groundwater level in different regions often varies greatly, and the use of empirical values ​​from other regions will often cause large errors, making the ecological groundwater level in arid plains The low estimation accuracy of the ecological groundwater level has seriously affected the scientific nature of the ecological groundwater level and hindered the practical application of the ecological groundwater level.

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