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A monitoring method for the evolution process of rocky desertification in dolomite karst area

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

Inactive Publication Date: 2019-09-13
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

Method used

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  • A monitoring method for the evolution process of rocky desertification in dolomite karst area
  • A monitoring method for the evolution process of rocky desertification in dolomite karst area

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Embodiment 1

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

[0040] 1) Flow measurement

[0041] Two Solinst LEVEL LOGGER water level automatic recorders (produced in Canada) are installed at the exit section of the Huangzhou River Basin to automatically record high time resolution relative water level and water temperature data. The automatic monitoring time interval is set to 15min, and the monitoring accuracy is 0.1cm and ±0.05°C. The Solinst water level automatic recorder is used to automatically record the relative water level process of the water section with high time resolution, and establish the water level (H) flow (Q) relationship curve between the flow and the relative water level. When the water level is high, the Xie Cai formula and Manning The formula is calculated and checked according to the fitted t...

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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 evolution process of rocky desertification in dolomite karst areas. Background technique [0002] Karst area is a fragile ecological environment. Unreasonable utilization by humans leads to soil erosion, habitat degradation, and even rocky desertification, a major ecological and environmental problem 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 of rocky desertification. [0003] During the evolution of rocky desertification, the chemical denudation rate of bedrock will also respond accordingly. Therefore, it is more efficient and accurate to calculate the chemical denudation rate in the karst area, which provides important parameters ...

Claims

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Application Information

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Patent Type & Authority Patents(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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