凍融循環(huán)和初始土壤含水量對(duì)東北黑土區(qū)土壤崩解速率的影響
【學(xué)位單位】:西北農(nóng)林科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位年份】:2019
【中圖分類】:S157.1
【文章目錄】:
abstract
摘要
CHAPTER 1 INTRODUCTION
1.1 Background and Research Importance
1.1.1 Background
1.1.2 Research importance
1.2 Literature Review
1.2.1 Effects of freeze-thaw cycles and Initial soil water content on soil mechanics
1.2.2 Soil disintegration rate
1.2.3 The measurement of soil disintegration rate
1.3 Current existing scientific issues
CHAPTER 2 RESEARCH CONTENTS AND METHODS
2.1 Research objectives
2.2 Research Contents
2.2.1 Initial soil water content impact on soil disintegration rate
2.2.2 Effects of freeze-thaw cycles on soil disintegration rate
2.2.3 Comparison of soil disintegration rate between remolded and undisturbed soils
2.2.4 Correlation between soil disintegration rate and soil properties
2.3 Technical routine
2.4 Research methods
2.4.1 Study site
2.4.2 Experimental device
2.4.3 Experimental Setup
2.5 Data analysis
CHAPTER 3 INITIAL SOIL WATER CONTENT IMPACTS ON SOIL DISINTEGRATION RATE AND PROCESS
3.1 Introduction
3.2 Materials and Methods
3.3 Results
3.3.1 Initial soil water content influence on soil disintegration rate
3.3.2 Initial soil water content influence on soil disintegration process
3.4 Discussion
3.5 Conclusion
CHAPTER 4 EFFECTS OF FREEZE-THAW CYCLES ON SOIL DISINTEGRATION RATE AND PROCESS
4.1 Introduction
4.2 Materials and Methods
4.3 Results
4.3.1 Freeze-thaw cycle influence on soil disintegration rate
4.3.2 Freeze-thaw cycle influence on soil disintegration process
4.4 Discussion
4.5 Conclusion
CHAPTER 5 COMPARISON OF SOIL DISINTEGRATION RATE AND PROCEDURE BETWEEN REMOLDED SOIL AND UNDISTURBED SOIL
5.1 Introduction
5.2 Materials and Methods
5.3 Results
5.3.1 Comparison of soil disintegration rate between remolded soil and undisturbed soil
5.3.2 Comparison of soil disintegration processes between remolded soil and undisturbed soil
5.4 Conclusion
CHAPTER 6 CORRELATION BETWEEN AFFECTING FACTORS AND SOIL DISINTEGRATION RATE
6.1 Introduction
6.2 Results
6.3 Conclusion
CHAPTER 7 CONCLUSIONS AND PERSPECTIVES
7.1 The Main Conclusions
7.2 Perspectives
REFERENCES
ACKNOWLEDGEMENTS
BIOGRAPHY
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