Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for determining watershed scale individual rainfall sediment sources

A sediment and source technology, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve problems such as the decline in the accuracy of prediction results, and achieve the effect of avoiding false numerical solutions

Inactive Publication Date: 2015-07-15
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with the hybrid model is that when the number of sediment sources increases, the accuracy of its prediction results drops significantly.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for determining watershed scale individual rainfall sediment sources
  • Method for determining watershed scale individual rainfall sediment sources
  • Method for determining watershed scale individual rainfall sediment sources

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] In this embodiment, it is assumed that the sediment source area includes agricultural land and forest land. Taking multiple soil samples on agricultural land n 1 , n 2 ... n 5 , multiple samples were collected in the woodland l 1 , l 2 ...l 5 , and the sediment samples at the basin outlet were collected during the rainfall runoff.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for determining watershed scale individual rainfall sediment sources. According to the method, the distance between a watershed scale sediment source and sediment and the weight of the distance are calculated by use of a discriminant analysis method, and the relative contribution rate of the watershed scale individual rainfall sediment source is calculated by use of the inverse relation of the distance and the contribution rate. The method is more reliable than a traditional mixed model and can be relatively slightly affected by the number of the sediment sources; the spatial sediment generation law of individual rainfalls can be studied and the contribution rates of the sediment sources different in rainfall intensity can be calculated; as a result, the limitation of the number of the sediment sources to the mixed model can be solved and the false numerical solution of the calculation result of the mixed model can be avoided.

Description

technical field [0001] The invention relates to the technical field of judging the source of sediment in a river basin, in particular to a method for determining the source of sediment in a river basin-scale sub-rainfall. Background technique [0002] Soil erosion has become one of the serious environmental problems in our country. Soil erosion will not only reduce land productivity, but the sediment entering the river will also damage the ecological environment of the river and block the river. At the same time, pollutants usually attach to the surface of the sediment and enter the river with the sediment, causing surface water pollution. Accurately judging the source of sediment and its contribution can provide an important basis for soil and water conservation and water resource management. [0003] The commonly used fingerprinting method can make up for the shortcomings of the current soil erosion models and soil erosion measurement methods in the prediction of large wa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/64
Inventor 刘冰曹文洪解刚王向东成晨赵阳周利军殷小琳朱毕生胡健张晓明杨涛
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com