Lake suitable ecological water level determination method based on paleo-marsh method

A method of determination, limnological technology, applied in the direction of instruments, electrical digital data processing, computer parts, etc., can solve problems such as lack of consistency of methods, influence of historical data, deviation of data statistics, etc., and achieve the effect of solving insufficient data collection

Active Publication Date: 2021-07-23
DONGGUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the bias of data statistics, irregular and incomparable time series data or differences in sampling techniques will all have an impact on historical data
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Method used

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  • Lake suitable ecological water level determination method based on paleo-marsh method
  • Lake suitable ecological water level determination method based on paleo-marsh method
  • Lake suitable ecological water level determination method based on paleo-marsh method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] see figure 1 , a method for determining the suitable ecological water level of a lake based on paleolimnological methods, comprising the following steps:

[0059] S1. Sediment sampling: use a gravity sampler to collect sediment column samples at selected sampling locations, and pretreat the samples;

[0060] Sediment column sampling specifically includes the following steps:

[0061] A1. Through local records, village surveys, satellite maps and topographic maps, several lake areas without obvious human interference were determined and selected as candidate sampling sites;

[0062] A2. Use a gravity sampler to collect a 30-60cm sedimentary column at each candidate sampling site, select a site with a better hierarchical structure as the final sampling site, and collect a sedimentary column about 1m long at this sampling site;

[0063] A3. Slice and layer the deposition column at a distance of 1 cm, number it, freeze-dry it, homogenize it, store it in a cool place, and ...

Embodiment 2

[0102] see Figure 1-5 , based on Example 1 but differing in that,

[0103] Taking Baiyangdian Lake as an example and taking hygrophytes as the research object, its suitable ecological water level is determined.

[0104] (1) Sediment sampling, the specific operation steps and method principles are as follows:

[0105] ①Through local records, village surveys, satellite maps and topographic maps at the bottom, several areas in Baiyangdian Lake without obvious human disturbance were determined and selected as candidate sampling sites;

[0106] ② Use a gravity sampler to collect 30 to 60 cm sedimentary columns from each sampling site in Baiyangdian Lake, compare the lithology (color and grain size) of each layer in the column, and the sedimentary column with obvious laminated structure and good compatibility is suitable, a site with a suitable sediment column will be used as the site for the final sampling study;

[0107] ③A 1m-long sedimentary column was collected at the sampl...

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Abstract

The invention discloses a lake suitable ecological water level determination method based on a paleo-marsh method, and belongs to the technical field of environmental protection. The method comprises the following steps: firstly, collecting a sediment columnar sample in a lake area with less man-made interference, and performing equidistant slicing and layering on the sediment columnar sample for pretreatment; secondly, determining the age of each sample layer by using 210Pb and 137Cs dating technologies; then, identifying and calculating the variety and quantity of sporopollen of each sample layer to represent aquatic plant information of an ecological system in a time sequence, collecting and measuring corresponding hydro meteorology and physical and chemical indexes, and constructing an environmental factor data set; and finally, establishing a generalized additive model according to the key environmental factors suggested by the classification regression tree model, quantifying the response relationship between the environmental factors and the sporopollen concentration, and determining a suitable lake ecological water level. According to the method, the problem that stable long-time sequence biological data is difficult to obtain in an existing design is effectively solved, and a quantitative method for exploring the response relation between water level fluctuation and local ecological indexes is provided.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for determining suitable ecological water levels of lakes based on paleontological methods. Background technique [0002] Water level fluctuation is one of the core factors affecting vegetation biomass, diversity, composition, and structure. It causes changes in environmental factors that affect plant growth and germination, such as light, oxygen, temperature, and nutrients. systems are particularly susceptible to water level fluctuations. In recent years, due to global climate change (changes in precipitation, precipitation frequency and single precipitation intensity) and human activities (large-scale water conservancy project construction, reclamation, etc.), lakes in many regions have experienced corresponding water level fluctuations. Abnormal fluctuations in water level will lead to the degradation of lake plants, the decline of self-purification ...

Claims

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Application Information

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IPC IPC(8): G06F16/2458G06K9/62G06Q50/26
CPCG06F16/2462G06F16/2465G06Q50/26G06F18/241
Inventor 杨盈沈周宝李明威
Owner DONGGUAN UNIV OF TECH
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