A Remote Sensing Early Warning and Water Scarcity Estimation Method for Watershed Vegetation Drought
A watershed and vegetation technology, applied in the direction of calculation, complex mathematical operations, instruments, etc., can solve the problems that vegetation drought cannot be used for stress early warning, multi-scale water shortage estimation accuracy is not high, etc.
Active Publication Date: 2021-09-14
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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[0006] Therefore, the embodiment of the present invention provides a remote sensing early warning and water shortage estimation method for watershed vegetation drought to solve the problems that the existing watershed vegetation drought cannot be used for stress early warning and the accuracy of water shortage estimation in multi-scale watersheds is not high.
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[0059] This embodiment discloses a remote sensing early warning and water shortage estimation method for vegetation drought in a watershed, including:
[0060] Step 1, spatial data processing and information extraction, extracting multi-scale watershed information, vegetation type information, runoff information, precipitation information and soil moisture information;
[0061] Step 2, carry out early warning of drought stress, calculate the amount of water resources and vegetation changes in the same period, and carry out drought early warning according to the instantaneous evapotranspiration index;
[0062] Step 3: Estimate the water shortage of vegetation during drought, and estimate the water shortage in a specific monitoring period based on the estimation of historical average water consumption in a specific period of time and the estimation of water consumption in a specific period of a monitoring year.
[0063] Step 1 carries out spatial data processing and information ...
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The embodiment of the present invention discloses a remote sensing early warning and water shortage estimation method for watershed vegetation drought. The method includes: step 1, spatial data processing and information extraction, extracting multi-scale watershed information, vegetation type information, runoff information, and precipitation information and soil moisture information; step 2, carry out early warning of drought stress, calculate the amount of water resources and vegetation changes in the same period, and carry out drought early warning according to the instantaneous evapotranspiration index; step 3, estimate the water shortage of vegetation drought, according to the specific time period Estimate the average water consumption for many years in the history, estimate the water consumption in a specific time period of the monitoring year, and estimate the water shortage in a specific period of monitoring. The invention solves the problems that the vegetation drought in the existing watershed cannot be used for early warning of stress, and the estimation accuracy of water shortage in multi-scale watersheds is not high.
Description
technical field [0001] The embodiments of the present invention relate to the field of ecohydrology and remote sensing, and in particular to a remote sensing early warning and water shortage estimation method for vegetation drought in a watershed. Background technique [0002] Arid areas refer to areas with little precipitation, large evaporation, and low yield. Water stress in vegetation ecosystems usually refers to the phenomenon that soil water shortage significantly inhibits vegetation growth. Water stress can also be caused by flooding, freezing, high temperature or salt damage. Water stress caused by drought and water shortage is the most common and has the greatest impact on plant water production. At present, water resources coordination and management are mostly carried out in units of river basins, sub-basins, and secondary sub-basins. [0003] Models and methods for remote sensing recognition of vegetation ecological water stress at different watershed scales. ...
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IPC IPC(8): G06F17/10G06Q50/02G06Q50/06G01N21/17G01N33/24
CPCG01N21/17G01N33/246G01N2021/1793G06F17/10G06Q50/02G06Q50/06Y02A40/22
Inventor 王大成滕启治王树东姚晓婧崔绍龙柳树福刘运宸
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI