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Applied research disintegration composite fingerprinting sediment sources

Author: ChenQiJun
Tutor: HuangYanHe
School: Fujian Agriculture and Forestry University
Course: Soil
Keywords: Granite Disintegration Composite fingerprinting Sediment sources Sediment migration
CLC: P642.2
Type: Master's thesis
Year: 2011
Downloads: 54
Quote: 0
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Abstract


Erosion and sediment sources hill collapsing migration law is one of the key research. Based on the disintegration of the differences in soil physical and chemical properties of soil characteristics, the composite fingerprint method is applied to study disintegration sediment erosion and sediment sources in migration law. In this study, Anxi County, Fujian select a typical disintegration, hierarchical collection six typical disintegration Bengbi soil samples, and according to the soil physical and chemical characteristics of the study area selected 11 kinds of factors as the candidate fingerprint fingerprint factor. By analyzing the fingerprint factor in the disintegration of differences in different layers and filter out the best combination of factors fingerprints, and then select one of the sources of sediment sampling points on its preliminary exploration and research. Main conclusions are as follows: 1. Analysis of 11 kinds of fingerprints factor at each sampling point with the sampling depth of the change and the change in soil with the disintegration characteristics shows that the choice of these 11 kinds of factors, there are four or more fingerprint fingerprint factor exist between different layers of disintegration significant difference, indicating in this study using composite fingerprint method produces Collapse Erosion Sediment sources analysis is feasible. (2) at each sampling point on 11 kinds of non-parametric test fingerprint factor and discriminant analysis, the results showed that each sampling point in at least six more kinds of fingerprints factor in different sediment sources there are significant differences in screening Fingerprint factor to meet the complex fingerprinting of sediment source requirements. 3 using stepwise discriminant method to filter out the optimum sampling point of each fingerprint combination of factors, and its further Filter results show that the fingerprint factor K and C can be used as general-purpose fingerprint study area for disintegration factor combination sediment sources of research. 4 Select one of the sample point sources of sediment disintegration exploratory research. Multivariate mixed model of the sampling points colluvial and alluvial sediment pile sources calculated results show that the red soil, sand and debris layer on its bottom layer colluvial sediment pile contribution percentages were 26.53%, 33.41% and 40.07%, indicating that the sampling points disintegration is still in a constant process of collapse. Red soil, sand layer and debris layer at a distance of 10m Bengbi alluvial sediment samples (CN1) relative sediment contribution percentages were 29.76%, 31.26% and 38.82%; red soil, sandy soil and debris layer of sediment samples at 20m distance Bengbi (CN2) relative sediment contribution percentages were 31.78%, 32.97% and 35.38%; red soil, sand layer and debris layer at a distance of 30m Bengbi sediment samples ( CN3) The relative contribution percentages were 23.54%, 37.05% and 39.40%. Description farther from Bengbi red soil sediment contribution rate reduced. In future studies not only to increase the number of fingerprint factor research, but also deal with the migration of sediment carried out a detailed study.

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