Dissertation > Excellent graduate degree dissertation topics show

Spatial and Temporal Variation of Ecohydrology Pattern in Liao River Basin

Author: LiuGuiJun
Tutor: LiFaYun
School: Liaoning University
Course: Ecology
Keywords: Water Resources Ecohydrological Temporal and spatial variation Liaohe River Basin
CLC: S271
Type: Master's thesis
Year: 2011
Downloads: 153
Quote: 0
Read: Download Dissertation

Abstract


The ecohydrological major hydrological mechanisms of scientific study of ecological processes and pattern changes. Different spatial and temporal scales, and a range of environmental conditions to explore the eco-hydrological processes is an important research direction. Due to the gradual emergence of a shortage of the world's freshwater resources, freshwater resources is becoming a limiting factor in the development of economic and ecological systems, eco-hydrology study to become one of the hot spots of ecological studies. Liaohe river basin area is very unevenly distributed, time change. Liaohe less surface water, groundwater is very limited, very serious water shortages. This paper mainly discusses the Liaohe basin land use, vegetation, climate and hydrological temporal and spatial variability and water quality relationship. Climate, hydrological and other data processing software used Origin7.5 data processing, GIS geographic information system to characterize the watershed spatial heterogeneity, integrated pollution index method to evaluate the water quality of the environment, to provide a theoretical basis for the Liaohe basin water ecological function zoning, The other major national water projects watershed ecological function partition of great significance. The findings of this paper include the following three aspects (1) analysis of the Liaohe basin land use and vegetation cover space changes. Basin mainly farmland, woodland, grassland, and not use the main. Basin showing the eastern and western mountain forest, mostly in central farmland trend. The east and west sides, vegetation cover overall trend of low central plains area of ??vegetation coverage consistent with the spatial distribution of annual rainfall in the region. (2) Liaohe basin temperature showed an upward trend, the spatial distribution from east to west on both sides showing an overall low middle high, gradually decreasing the state from north to south. The Liaohe basin precipitation spatial distribution of increase gradually from west to east, from south to north gradually reduce the trend. Time series, the temperature was rising, and rainfall showed a downward trend. (3) The depth of the spatial variation of the Liaohe basin runoff gradually from west to east, from south to the North gradually reduce the trend, overall. Liaohe River runoff depth and the East Liaohe runoff depth time is roughly the same. 20a average annual runoff depth of a downward trend, decreasing East Liaohe River and Liaohe River runoff. The upward trend in changes in the West Liaohe 10a annual average runoff depth, the West Liaohe runoff in a rising trend. According to the figure shows average annual rainfall of Liaohe River Basin the Liaohe basin runoff and precipitation closely related, roughly the same trend of runoff and precipitation trends.

Related Dissertations

  1. Temporal and Spatial Variation of Methane Emission from Urban Lake and Its Relationship with the Hydrology-water Quality,X524
  2. Research on Evaluation System of Irrigation Area Drought,S423
  3. Under Environment History Angle of View Traditiao Farmland Water Conservancy Constructino Research,S274
  4. Study about the Farmer Behavior on the Dryland in the Western Arid Regions,S423
  5. Tengzhou GIS-based water management system design and implementation,TV213.4
  6. Study on Optimal Allocation of Regional Water Resources Based on PSO,TV213.4
  7. Analysis of Water Resources Carrying Capacity Based on a System Dynamic Model and System Optimization,X26
  8. The Study and Application of Carrying Capacity of Water Resources in Liaoning Province,TV213.4
  9. Study on the Water Resources Management and Development Model in Handan,TV213.4
  10. Legal issues of the protection of groundwater resources in Shandong Province,TV213.4
  11. Studies on Temporal and Spatial Variation of the Capacity and Value of Soil Carbon Storage in Regional Farmland Based on GIS,X144
  12. Simulation Research on Landscape Water Nourished by Unconventional Water Resources,X524
  13. Arbuscular mycorrhizal fungi on the nitrogen-fixing capacity of Amorpha,S567.19
  14. A Model on Monitoring Nitrogen Content and Growth Status of Wheat Based on Hyperspectral Remote Sensing in Temporal and Spatial Changes,S512.1
  15. Design of Multi-objective Allocation of Irrigation Water Management Systems Based on Genetic Algorithm Optimal Methodology and Its Implementation,TP311.52
  16. The Analysis to the Characteristics of Temporal and Spatial Variation of Guangxi Inbound Tourism Market,F592.7
  17. Optimizing the Allocation of Water Resources Research at the City of Shijiazhuang,F299.24
  18. Supply-demand Analysis of Water Resources in Harbin and Countermeasures,TV213.4
  19. Research on the Water Resources Carrying Capacity in Huaihe River Basin,TV213.4
  20. Urban Water Demand for Eco-Environmental,X143
  21. Study on the Optimal Allocation of Urban Water Resouces of Multi-water Resources and Multi-waterworks,TU991

CLC: > Agricultural Sciences > Agricultural Engineering > Irrigation and water conservancy > Agricultural hydrology
© 2012 www.DissertationTopic.Net  Mobile