Dissertation > Excellent graduate degree dissertation topics show

An Analysis of the Runoff in Dengyingyan Station of Tuojiang River Basin

Author: JiangQian
Tutor: XuGang
School: Southwestern University
Course: Natural and geographical
Keywords: Run-off Concentration The coefficient of variation Tuojiang River
CLC: P333.1
Type: Master's thesis
Year: 2010
Downloads: 78
Quote: 0
Read: Download Dissertation

Abstract


Runoff as a basic part of the hydrological cycle, the basic elements of water balance, is the most active factor in the natural and geographical environment, with the in-depth study of the evolution of the natural environment, increasingly in recent decades to the past century time scales more attention. Runoff water as a human production and life most closely, has been widespread concern. Therefore, the runoff analysis, the to understanding runoff evolution of existing law, and seeking to cause changes in runoff. Contribute to the understanding of the characteristics of water resources, to provide a basis for the rational development and utilization of water resources, but also conducive to the development of process control and adjust. With the the various basins economic development, industry, agriculture and ecological water demand continues to increase, the amount of water resources in the basin each part of the distribution plan research is very necessary objective need to further strengthen the small and medium-sized basin runoff changes . Explore integrated watershed development use, to carry out the construction of a water-saving society and maintain the healthy life of rivers and so has a great significance. Papers selected Tuojiang River as the research object, based on analysis of progress, and proceed from runoff and interannual variability, Kendall nonparametric rank correlation test of Tuojiang runoff analysis, combined with the accumulated variance method, statistical analysis methods such as correlation analysis was done. Analysis by the observational data Dengying rock hydrological station, located in the capital of the county Tuojiang midstream decades, in order to find the Tuojiang River runoff changes in the law, and further to find out the Tuojiang runoff, to identify the characteristics and trends of runoff change, guiding watershed plays an important role in water resource utilization, changes in runoff, but also reveal to some extent. Therefore, analysis of runoff change on the Tuo Jiang Dengying rock hydrological station has a strong practical guidance value and certain theoretical significance. The paper is divided into the following parts: The first part of the introduction. Introduced the background and significance of the topic of the article, current research, research content and methods. With the development of the quantitative study of Hydrological Sciences, as well as the importance of the study of small and medium-sized basin, the analysis of the present status of runoff change research at home and abroad with the problems to combine the Tuojiang river basin runoff practical, to clarify the necessity and significance of the study. The second part of the basin overview. General overview of the study area, the study area for the Tuo River basin, a tributary of the Yangtze River, the site selected for the the Tuojiang midstream in Zizhong County in Neijiang City Dengying rock hydrological station data using runoff from month to month, and since 1954 the annual runoff natural conditions and socio-economic conditions of the study area, the overview description for the latter part of the results of the analysis to find the reasons why. The third part, the runoff distribution analysis. Through statistical analysis of historical data, using statistical analysis, annual distribution uniform coefficient C1 concentration Cn and concentration of D parameter analysis, draw Tuojiang runoff distribution feature. The fourth part, runoff interannual variation analysis. By experimental data on the Tuo Jiang Dengying rock hydrological stations in recent decades, to select the coefficient of variation of annual runoff, runoff sequence distribution, runoff evolution stage and mutations such indicators, using the Kendall rank test method, cumulative anomalies data analysis to identify the characteristics of the Tuojiang runoff interannual variability. The fifth part, runoff changes influencing factors. In two major areas Tuojiang runoff above analysis of the results were analyzed, one of the meteorological factors on runoff in the second to the impact of human activities on watershed runoff. Part VI Conclusions and Discussion. Summarize in Tuojiang runoff change analysis results obtained through this study, and proposed to do in the area runoff change analysis is also conducted in-depth analysis and research directions. In this paper, Tuojiang River runoff changes as the object of study, runoff and interannual variability analysis through the decades of the measured data to enrich the study of the water resources of the Tuojiang River, better integrated watershed development and management of practical significance .

Related Dissertations

  1. Study on Dust Concertiation Measurement Technique Based on Optical Back-Scattering,X831
  2. Methane Concentration Detecting Instrument Based on Infrared Absorption Theory,TP216
  3. Effects of Light, Temperature and Nitrogen on the Growth of Three Kinds of Aquatic Plants,Q945
  4. Phosphate byproduct sodium fluosilicate chlorine wastewater recycling study,X786
  5. Study on the Simulation of Agricultural Non-point Source Pollution in Huaihe River Basin in Henan Provice,X52
  6. Study on Nitrogen Removal by Soil Aquifer Treatment Process That Enhanced Nature Reoxygenation and Effective Volume,X703
  7. Bioavailability of Phthalic Acid Esters in Different Types of Soil-plant Systems,X53
  8. Treatment of High Concentration Oil-Bearing Wastewater in Food Industry with Membrane Biofilm Reactor (MBR),X792
  9. Concentration and Impact Factors of Typical VOCs in Indoor Air in Hangzhou,X51
  10. Pharmacokinetics of Progesterone Cream in Beagle Dogs Determined with LC-MS/MS,R96
  11. Ecological Risk Assessment of Marine Gastropod Mollusks Population,X174
  12. Study on the Interaction among Flea-Algae-Grass Cultured in Different Nitrogen and Phosphorus Concentration,X173
  13. Research on Gas Recovery and Utilization Technology in Mine Return Current,TD712
  14. The Feature of Sediment Yield and Hydrodynamics of Different Underlying Surfaces in the Construction of the Shenfu-dongsheng Coal Field,S157.1
  15. Optical Properties of Chlorphyll-a in Reservoir Water and Its Concentration Inversion Models by Remote Sensing,S127
  16. The Influences of Blood Glucose Levels on the Function of Neutrophil-moncyte Cell Line HL-60 Cells,R587.1
  17. Cefotaxime on intracellular calcium ion transmembrane BEHAVIORS,R96
  18. China's construction market competition mechanism,F284
  19. High glucose in human umbilical vein endothelial cells expression of renin precursor,R543.5
  20. Ussuri intends Chang breeding biology,S917.4
  21. A securities company's financial control issues,F830.42

CLC: > Astronomy,Earth Sciences > Geophysics > Hydrological Sciences (water sector physics) > Hydrological analysis and calculation > Water balance
© 2012 www.DissertationTopic.Net  Mobile