Method for monitoring stony desertification evolution process of dolostone karst region

A technology of evolution process and rocky desertification, applied in the direction of measuring devices, instruments, etc., can solve the problems of unscientific technical reference, rough estimation, and rare calculation methods of chemical denudation rate

Inactive Publication Date: 2017-11-21
GUIZHOU NORMAL UNIVERSITY
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Problems solved by technology

[0004] Previous calculations of chemical denudation rates were mainly in limestone areas or areas where limestone and dolomite are co-distributed, but there are few methods for calculating chemical denudation rates in purer dolomite watersheds, and previous studies on denudation rates of other carbonate rocks The estimation is relatively rough, and the technical references used to feed back the evolution process of rocky desertification and regional development planning are not very scientific

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  • Method for monitoring stony desertification evolution process of dolostone karst region
  • Method for monitoring stony desertification evolution process of dolostone karst region

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Embodiment 1

[0039] 1. Select the typical dolomite basin of the Huangzhou River in Shibing World Natural Heritage Site, Guizhou as the research sample site, and the density of dolomite is 2.6g / cm 3 , the accumulated water area of ​​the basin is 49.19km 2 .

[0040] 1) Flow measurement

[0041] Two Solinst LEVEL LOGGER water level automatic recorders (produced in Canada) were installed at the outlet section of the Huangzhou River Basin to automatically record relative water level and water temperature data with high time resolution. The time interval of automatic monitoring is set to 15 minutes, and the monitoring accuracy is respectively 0.1cm and ±0.05°C. Using the Solinst water level automatic recorder with high time resolution to automatically record the relative water level process of the cross section, and establish the water level (H) flow (Q) relationship curve between the flow and the relative water level. When the water level is high, Xie Cai's formula and Manning will be used ...

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Abstract

The invention provides a method for monitoring the stony desertification evolution process of a dolostone karst region, and the method comprises the following steps: automatically recording the relative water level of a flow cross section of a research area through a water level automatic recorder, and deducing and obtaining flow data through the Chezy formula and the Manning formula in hydraulics and hydrology; measuring the concentrations of Ca2+ and Mg2+ through outdoor onsite titration and a VBTAMPX type lab inductive coupling plasma light emission spectrometer; calculating the chemical denudation rate of a dolostone drainage basin according to the obtained data, the known relative density of dolostone and the catchment area of the drainage basin; carrying out the year-by-year comparison according to the calculated chemical denudation rate of the dolostone drainage basin, and judging the stony desertification evolution trend of the dolostone karst region. According to the invention, the method can achieve the more effective evaluation of the stony desertification evolution process of the dolostone karst region, and provide scientific basis for the control of the stony desertification of the dolostone karst region.

Description

technical field [0001] The invention relates to a monitoring method for the rocky desertification evolution process in the dolomite karst area. Background technique [0002] The karst area is a fragile area of ​​ecological environment. Unreasonable use by humans has caused water and soil erosion, resulting in habitat degradation, and even formed a major ecological and environmental problem—rocky desertification—that plagues regional economic development and ecological construction. In order to evaluate the control effect of rocky desertification, it is necessary to monitor the evolution process of rocky desertification, so as to adjust the control measures. At present, there are few monitoring methods for the evolution process of rocky desertification. [0003] During the evolution of rocky desertification, the chemical denudation rate of the bedrock will also respond accordingly. Therefore, the more efficient and accurate calculation of the chemical denudation rate in kar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
Inventor 肖时珍何江湖曾成狄永宁
Owner GUIZHOU NORMAL UNIVERSITY
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