Analysis method of groundwater ecological buried depth in arid area based on joint probability distribution
A technology that combines probability distribution and groundwater depth, applied in data processing applications, complex mathematical operations, instruments, etc., can solve problems that affect the accuracy and rationality of groundwater ecological depth analysis results, and unfavorable sustainable development of natural oasis protection , achieve the effect of realizing green sustainable development, improving accuracy and rationality
Active Publication Date: 2022-03-25
HOHAI UNIV
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The vegetation index-groundwater depth response curve obtained by regression fitting analysis is often difficult to fully describe the complex relationship between vegetation indicators and groundwater depth, which affects the accuracy and rationality of the analysis results of groundwater ecological depth, which is not conducive to arid areas. Natural Oasis Protection and Sustainable Development of the River Basin in the Middle and Lower Reaches of the Lu River Basin
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[0036] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0037] The application research area of the embodiment of the present invention is the Turpan Basin. The Turpan Basin is located in the central part of the Xinjiang Uygur Autonomous Region of my country, with an area of about 50,000 km 2 , surrounded by mountains on three sides, is a typical arid inland river basin. Huoyanshan and Yanshan run through the central part of the Turpan Basin along the east-west trend, dividing the basin into the North Basin and the South Basin; the South Basin has the lowest point in my country's inland—Aiding Lake, with an altitude of -154m. The climate type of the Turpan Basin is a typical warm temperate arid desert climate. The groundwater in the basin is mainly supplied by precipitation and ice and snow melt water from the surrounding mountainous areas. Groundwater-dependent vegetation is ...
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The invention discloses a method for analyzing the ecological depth of groundwater in arid areas based on the joint probability distribution. The normalized vegetation index is used as the vegetation index to represent the growth status of the vegetation, and the normalized vegetation of the groundwater-dependent vegetation sample points in the middle and lower reaches of the watershed is collected. Index and groundwater depth data; count the frequency of vegetation occurrence in different groundwater depth intervals, and use the frequency of vegetation occurrence as an intermediate variable to construct the joint probability distribution of groundwater depth and normalized vegetation index; set the protection of groundwater-dependent vegetation The goal is to analyze and calculate the conditional probability of achieving the vegetation protection goal in different groundwater depth intervals, and take the groundwater depth corresponding to the maximum value of the conditional probability as the groundwater ecological depth. It overcomes the inadequacy of existing methods to comprehensively describe the relationship between vegetation indicators and groundwater depth, provides an effective tool for ecological water assessment in inland river basins in arid areas, and supports the protection and management of groundwater-dependent terrestrial ecosystems.
Description
technical field [0001] The invention belongs to the technical field of ecological hydrology under geophysics, and in particular relates to an analysis method for groundwater ecological buried depth in arid areas based on joint probability distribution. Background technique [0002] The inland river basins in the arid region of Northwest my country have scarce water resources and fragile ecology. The precipitation in the basin is concentrated in the upper mountainous area, while the middle and lower reaches and the hinterland of the basin have little precipitation and strong evaporation. The survival of natural vegetation in the middle and lower reaches of the basin mainly depends on shallow groundwater, forming a groundwater-dependent terrestrial ecosystem. In order to maintain the normal performance of the ecological service function of the groundwater-dependent terrestrial ecosystem, it is necessary to maintain the ecological depth of groundwater to ensure the water deman...
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IPC IPC(8): G06F17/18G06Q10/06G06Q50/26
CPCG06F17/18G06Q10/06393G06Q50/26
Inventor 黄峰
Owner HOHAI UNIV