Method for measuring ecological water demand of degraded wetland based on water level gradients

A measurement method and technology for water demand, applied in the field of measuring the ecological water demand of degraded wetlands, can solve the problems of large error in evapotranspiration consumption, poor measurement accuracy, unfavorable restoration and protection of degraded wetlands, etc. and protective effect

Active Publication Date: 2018-09-18
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

[0005] 2. Calculation of the annual ecological water demand of flooded swamp plants: the annual ecological water demand Wp of the flooded swamp plants to be measured = ET whole year × A/1000 = ET growth season × (1+E non-growth season/E growth Season)×A/1000, the patent accurately records the evapotranspiration and water consumption of the flooded swamp in the wetland to be measured through a simple evaporation barrel, combined with the evaporation monitoring data of the weather station in the wetland to be measured, it can be converted into the non-growing season wintering of the northern swamp evapotranspiration consumption, but the calculation accuracy of this patent is poor, the evapotranspiration consumption obtained has a large error, and the influence of water level gradient is not considered, which is not conducive to the restoration and protection of degraded wetlands
[0007] Step 1: Obtain the rainfall value of the river basin, and use the inverse distance weight interpolation method to perform spatial interpolation on the rainfall value of the river basin, make a rainfall distribution map and a contour map, and obtain the rainfall of the river basin , that is, the total amount of water resources; Step 2: Obtain the latent heat of vaporization, maximum temperature, minimum temperature, saturated ...

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  • Method for measuring ecological water demand of degraded wetland based on water level gradients
  • Method for measuring ecological water demand of degraded wetland based on water level gradients
  • Method for measuring ecological water demand of degraded wetland based on water level gradients

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Embodiment Construction

[0065] Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0066] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that they may use different terms to refer to the same component. The specification and claims do not use differences in nouns as a way of distinguishing components, but use differences in functions of components as a criterion for distinguishing. "Includes" or "comprises" mentioned throughout the spe...

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Abstract

The invention discloses a method for measuring the ecological water demand of a degraded wetland based on water level gradients, and the method comprises the steps: collecting the raw data of a predetermined area, wherein the raw data comprises terrain data, a land use type map and meteorological data, and the meteorological data includes temperature, air pressure, wind speed and total surface radiation quantity data; setting sample sites under different water level gradients, selecting targets species, measuring vegetation data, carrying out sample survey to obtain vegetation parameters, wherein the vegetation parameters includes a vegetation height, vegetation coverage and a leaf area index; carrying out the linear interpolating of the measured vegetation parameters to obtain annual vegetation parameter data; determining a water level threshold suitable for vegetation growth under different water level gradient conditions based on vegetation parameter data and the plant; obtaining the vegetation distribution data under different water level gradient conditions based on the water level threshold and the topographic data and land use type map of the predetermined area, measuring the annual potential evapotranspiration, and obtaining the ecological water demand of the degraded wetland based on water level gradients.

Description

technical field [0001] The invention relates to the field of water conservancy, in particular to a method for measuring ecological water demand of degraded wetlands based on water level gradient. Background technique [0002] Wetland is a unique ecosystem formed by the interaction of water and land on the earth. It is the ecological landscape with the richest biodiversity in nature and one of the most important living environments for human beings. It has huge functions and values. However, due to the double impact of climate change and human activities, the area of ​​wetlands has decreased sharply and their functions have been seriously degraded. Protection of existing wetlands, restoration of degraded wetlands and rational use of wetlands have become the most effective means to exert ecological, social and economic benefits of wetlands. Estimating the water demand of degraded wetland ecological environment is an urgent problem to be solved in degraded wetland ecology and ...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/06315G06Q50/26
Inventor 刘强平凡刘静玲刘海飞
Owner BEIJING NORMAL UNIVERSITY
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