Ecological drought monitoring and evaluating method

A drought and ecological technology, applied in the design of monitoring and evaluation methods, can solve problems such as poor description of vegetation growth mechanism, lack of consideration of the effect of carbon dioxide on vegetation, and few factors determining evaluation.

Active Publication Date: 2021-05-07
YELLOW RIVER ENG CONSULTING +1
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Problems solved by technology

[0005] However, the existing drought damage assessment methods for ecosystems also have corresponding defects. The experimental observation method is relatively simple, ignoring the physical impact of the drought process on vegetation growth, and not considering the effects of soil moisture, nutrients, and carb

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[0048] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the implementations shown and described in the drawings are only exemplary, intended to explain the principle and spirit of the present invention, rather than limit the scope of the present invention.

[0049] Embodiments of the present invention provide a method for monitoring and evaluating ecological drought, such as figure 1 As shown, the following steps S1-S5 are included:

[0050] S1. Collect multi-source data in the study area, and use multi-source data to build an ecological drought disaster database.

[0051] In the embodiment of the present invention, the multi-source data includes physical geography data, station hydrology data, water conservancy survey data, remote sensing data, disaster statistics data over the years, and the carbon-water exchange flux long-term of China Terrestrial Ecosystem Flux Observat...

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Abstract

The invention discloses an ecological drought monitoring and evaluation method, which comprises the following steps: firstly, collecting multi-source data of a research area and constructing an ecological drought disaster database, then calculating hydrometeorological and hydrological drought indexes according to the multi-source data, extracting hydrological drought characteristics, then carrying out space-time law and evolution characteristic analysis on the hydrological drought characteristics, monitoring the ecological drought of the research area according to an analysis result, constructing a Biome-BGC model to calculate the net primary productivity of an ecological system, and finally obtaining the comprehensive ecological system productivity of the research area by adopting a random forest model, so as to achieve the ecological drought assessment of the research area. The comprehensive ecological system productivity value obtained by adopting the random forest model not only considers ecological factors, but also comprises factors causing hydrological drought and human factors, so that the evaluation of ecological drought is more comprehensive and accurate, and the problems of few considered factors and difficulty in parameter adjustment of a traditional ecological drought loss evaluation method are solved.

Description

technical field [0001] The invention belongs to the technical field of ecological environment management, and in particular relates to the design of a method for monitoring and evaluating ecological drought. Background technique [0002] In recent years, research directions related to the construction of ecological civilization, such as ecological water cycle and ecological drought monitoring and evaluation, have gradually become research hotspots. Carrying out research on the impact of drought on watershed ecosystems under the influence of multiple factors not only has important practical significance for the ecological environment governance in areas prone to ecological drought, but also has a great promotion for the interdisciplinary research of ecology and hydrology. and theoretical significance. [0003] Decision tree is an example-based inductive learning in machine learning, which uses a top-down induction method. The biggest advantage of the decision tree algorithm...

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Application Information

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IPC IPC(8): G06F30/20G01D21/02
CPCG06F30/20G01D21/02
Inventor 付健张金良谭培颖雷添杰黄锦涛李翔宇
Owner YELLOW RIVER ENG CONSULTING
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