黃土地貌繼承性研究是揭示黃土地貌二百余萬年來發(fā)育、演化機理的關鍵環(huán)節(jié)，也是黃土地貌研究的重要關注點。前人對黃土地貌繼承性及相關問題進行了較多的研究，初步探討了第三紀古地形對當今黃土地貌形成的控制作用。但是，目前對黃土地貌繼承性的成因機理、影響程度及區(qū)域差異性等問題尚未形成共識。數字高程模擬（DEM)及基于DEM的數字地形分析，為在GIS平臺下實現地表形態(tài)的定量描述與分析提供了新的思想和方法。如果能夠建立第三紀黃土下伏古地形的數字高程模型，從而構建地表-地下一體化的雙層的數字高程模擬，就可望通過運用GIS復合分析等多種空間分析方法，有效揭示黃土地貌繼承性研究中的科學問題，實現黃土地貌研究的理論突破與方法創(chuàng)新。研究首先分析了黃土地貌繼承性的概念模型。其地形面的DEM、地質圖以及鉆孔物探資料為依據，重建了三種空間尺度的黃土堆積前原始地形面的DEM，進而構建了地表-地下一體化的“雙層地形模型”。并據此模型，通過面積高程積分、坡向變異特征、地形剖面比降及地形剖面凸凹度等方法與指標，分析現今地形與古地形的空間關系，獲得在下伏古地形控制作用下，黃土堆積對地表起伏變化、地貌發(fā)育變化及黃土地貌空間分異格局的新認識。
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Contents
Foreword
Acknowledgements
Chapter 1 Significance of loess landform inheritance 1
1.1 Introduction of the scientific problem 1
1.2 Research significance 6
1.3 Literature review 7
1.4 Research contents and objectives 22
1.5 Overall research methods and technical routes 23
1.6 Monograph structure 25
Chapter 2 General background of the study area and materials 27
2.1 Study area 27
2.2 Research materials 33
2.3 Summary of this chapter 39
Chapter 3 Conceptual model of loess landform inheritance 40
3.1 Basic concepts 40
3.2 Existing conditions and influencing factors 43
3.3 Basic characteristics 50
3.4 Expressing methods 54
3.5 Type classification 57
3.6 Geo-meanings 66
3.7 Summary of this chapter 68
Chapter 4 Reconstruction of the loess underlying paleotopography for loess landform inheritance 70
4.1 Overall design of the reconstruction method 71
4.2 Reconstruction of the loess underlying paleotopography in the macroscale 73
4.3 Reconstruction of the loess underlying paleotopography in the mesoscale and microscale 87
4.4 Uncertainty of loess underlying paleotopography reconstruction 104
4.5 Basic features of the loess underlying paleotopography 122
4.6 Summary of this chapter 129
Chapter 5 Investigation of loess landform inheritance by using quantitative terrain indexes 131
5.1 Quantitative indexes for expressing loess landform inheritance 131
5.2 Loess landform inheritance analysis by using the characteristic of elevation statistical distribution 134
5.3 Loess landform inheritance analysis by using the characteristics of the terrain profile 145
5.4 Loess landform inheritance analysis by using the characteristics of terrain factors 154
5.5 Summary of this chapter 164
Chapter 6 Spatial variations in loess landform inheritance 166
6.1 Spatial variation and scale effect of loess deposition in relation to paleotopography in the Loess Plateau 167
6.2 Spatial differences in the evolution of modern gullies in the Loess Plateau in relation to paleotopography 184
6.3 Summary of this chapter 200
Chapter 7 Conclusions and perspectives 202
7.1 Conclusions of this research 202
7.2 Innovations of this research 205
7.3 Limitations and perspectives 206
References 208
Appendix 227
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