Dissertation > Excellent graduate degree dissertation topics show

Characteristics of Runoff and Soil Erosion of Typical Forest Types in the Source of Qiantang River

Author: TangXiaoYan
Tutor: YuanWeiGao
School: Zhejiang Forestry University
Course: Ecology
Keywords: water and soil loss surface runoff soil erosion Nutrien loss typical foresttypes Qiantang river
CLC: S714
Type: Master's thesis
Year: 2012
Downloads: 45
Quote: 0
Read: Download Dissertation

Abstract


This research studied on the establishment of plots among the different forest types in the sourceof Qiantang River. The seven typical forest types studied (Pine forest, Chinese fir forest, Deciduousbroad-leaved forest, Coniferous and broad-leaved mixed forest, Bamboo forest, Evergreenbroad-leaved shrub, Evergreen broad-leaved forest) are representative of situations commonly foundin the Qiantang river watershed. The specific goals were to evaluate and compare the hydrologicaland erosional response of soil representing different forest types, to establish the influence of climaticvariability and soil surface characteristics. The results are as follows.Significant hydrogeomorphic responses among different forest types, the order of averagesurface runoff was Bamboo forest＞Evergreen broad-leaved shrub＞Deciduous broad-leaved forest＞Pine forest＞Coniferous and broad-leaved mixed forest＞Evergreen broad-leaved forest＞Chinese firforest; the order of average soil erosion was Bamboo forest＞Evergreen broad-leaved shrub＞Deciduous broad-leaved forest＞Pine forest＞Coniferous and broad-leaved mixed forest＞Chinese firforest＞Evergreen broad-leaved forest. It’s obvious that bamboo forest as the most serious in terms ofrunoff and soil erosion, conversely, Chinese fir forest and Evergreen broad-leaved forest showed thelowest runoff and soil erosion. In lost nutrients of these forest types, it was shown that TK> TN>TP.Nurtrient losses are driven by soil losses more than runoff. The lightest nutrient losses in runoff andsoil erosion were found in Evergreen broad-leaved forest, and the heaviset is bamboo forest.Between surface runoff(RF) and precipitaton(P), there was a regressive relation equation,RF=aP2+bP+c, and the similar equation between monthly change of soil erosion and monthly changeof precipitation. Within a certain range of rainfall, runoff increased was in accordance with rainfall,but not uniform increase. Nutrients by runoff and soil erosion are significantly correlated with runoffand soil loss linearly.Vegetation as a key factor in quantifying and interpreting the hydrological and erosional responseof different forest monitored. Soil erosion and nutrients loss can subsequently be controlled bychanging the forest type and increasing the ground cover.In summary, the Bamboo forest is not conducive to maintaining soil fertility continues todeteriorate with the growth of forest age; and evergreen broad-leaved forest, mixed coniferous canincrease or stabilize the soil physical and chemical properties, to reduce surface runoff and improve the soil erosion resistance effectively.

Related Dissertations

  1. Effect of Soil Erosion on Soil Quality in the Cultivated Slope Land on the Loess Plateau, China,S157.1
  2. Lijiang River,RS and GIS - based Soil Erosion Research,S157
  3. Research on Rainfall Erosivity in Jiangsu Province,S157.1
  4. Preparation of Bio-material Liquid Film and Its Applying Effects,S316
  5. Black Soil Freeze-thaw Function Mechanism and Soil Erosion Simulation Study in the Spring Thaw Period,S157
  6. The Feature of Sediment Yield and Hydrodynamics of Different Underlying Surfaces in the Construction of the Shenfu-dongsheng Coal Field,S157.1
  7. Soil Erosion Types and Intensity Analysis on the Three-river Headstream Region,S157
  8. Study on the Failure Mechanism of Ancient Sea Wall of Qiantang River,TV139.2
  9. The Dynamic Change of Soil Erosion and Its Driving Mechanism in North Fujian Province,S157
  10. The Migration of Heavy Metals in the Surface Runoff of Dabaoshan Mining Area,X502
  11. Charcoal on pear soil carbon - nitrogen - phosphorus, and microbial diversity.,X172
  12. Application of GIS and Reomote Sensing on Comprehenvsive Treatment of Water and Soil Consevation in a Small Catchement,S157
  13. Soil Erosion of Small Watershed Study by GIS Technology,S157
  14. Evaluation on Sensibility for Soil Erosion and Research on Management Configuration in Shandong,S157
  15. Based on RS and GIS regional landscape pattern and soil erosion Relations,S157
  16. Fuxin Sunjiawan Waste Dump Evolution of soil erosion and gully erosion,S157.1
  17. Research on Soil Erosion in the Funiu Mountainous Areas of Huai River Basin Based on GIS,S157
  18. Study on Water and Soil Losses Dynamic Monitor in Anxi Country Based on Geomatics,S157
  19. Describing System of Soil Erosion Factor Spatial Variability,P208
  20. Relationship of Nitrogen and Phosphorus Output with Fertilization in Flue-cured Tobacco Slope Farmland in the Typical Small Watershed of Fuxian Lake,S572
  21. The Vegetation Control Soil Erosion Effect and Evaluation Research of the Open-pit Dump Runoff Area,S157.2

CLC: > Agricultural Sciences > Forestry > Forestry basic science > Forest soil science
© 2012 www.DissertationTopic.Net  Mobile