等效沙厚度研究进展

doi:10.7522/j.issn.1000-694X.2021.00002

摘要/Abstract

摘要：

风、沉积物和地表覆盖是控制沙丘地貌的三大要素。沉积物尤其是沙源供应对沙丘地貌的影响仍有待深入研究。沙丘体积的研究促使了等效沙厚度（equivalent sand thickness， EST）概念的提出。EST研究经历了多个沙丘和亚沙丘尺度2个研究阶段。多个沙丘EST研究发现，EST与沙丘高度之间具有较好的一致性，其与方向变率的组合可以很好地区分沙丘类型，且在宏观上可以表征沙源供应。亚沙丘尺度EST研究使得利用高分辨率遥感影像研究沙丘（山）地貌及其形成过程成为可能。未来的研究应在像元尺度上对沙丘（山）地貌进行滤波，不同滤波窗口所得到的不同图层可以用来探究沙丘（山）地貌的形成过程。

关键词: 等效沙厚度, 沙源供应, 沙山世代, 沙丘类型, 地貌格局

Abstract:

Wind， sediment and surface cover are the three main factors controlling dune landforms. However， the impact of sediment， especially sand supply， on dune landforms remains to be further studied. The study on the dune volume gives rise to the concept of the equivalent sand thickness （EST）. The study of EST has gone through two research stages of multiple dune and sub-dune scales. The multiple dune scalestudy showed that there is a good consistency between EST and dune height. The relationship between EST and dune height can reflect dune types and sand supply. The combination of EST and directional variability can be used to distinguish dune types in different regions. EST can characterize the sand supply on a macro level. The sub-dune scale research makes it possible to use high resolution remote sensing images to study dune/megadune landforms and their formation processes. High resolution data allow researchers to focus on details that have previously been overlooked. This may be the key to distinguishing the different types of dune. Future research should filter dune/megadune landforms on the pixel scale. Different layers obtained from different filtering windows can be used to explore the formation process of dune/megadune landforms. The application of high resolution data can correct the existing geomorphic pattern rules and explore the relationship among morphological indexes still in dispute and the physical significance represented by them. Since EST can represent total sand supply， more attention should be paid to sand supply per unit time and its spatial variation in the future. These will have a huge impact on the aeolian science and even surface processes， and push these fields forward.

Key words: equivalent sand thickness, sand supply, megadune generations, dune types, geomorphic pattern

中图分类号:

P931.3

肖南, 董治宝, 刘铮瑶, 拓宇, 冯淼彦, 朱春鸣, 石寰宇. 等效沙厚度研究进展[J]. 中国沙漠, 2021, 41(3): 1-6.

Nan Xiao, Zhibao Dong, Zhengyao Liu, Yu Tuo, Miaoyan Feng, Chunming Zhu, Huanyu Shi. Reviews on the research of equivalent sand thickness[J]. Journal of Desert Research, 2021, 41(3): 1-6.

参考文献 31

1	Wilson I G.Aeolian bedforms-their development and origins［J］.Sedimentology，1972，19（3/4）：173-210.
2	董治宝，吕萍.深空探测时代的风沙地貌学［J］.地球科学进展，2019，34（10）：1001-1014.
3	Livingstone I，Warren A.Aeolian Geomorphology：An Introduction［M］.Harlow，UK：Longman，1996.
4	Mabbutt J A.Desert Landforms［M］.Cambridge，Massachusetts，USA：MIT Press，1977.
5	Hugenholtz C H，Barchyn T E.Spatial analysis of sand dunes with a new global topographic dataset：new approaches and opportunities［J］.Earth Surface Processes and Landforms，2010，35（8）：986-992.
6	Wasson R J，Hyde R.Factors determining desert dune type［J］.Nature，1983，304（5924）：337-339.
7	Wilson I G.Ergs［J］.Sedimentary Geology，1973，10（2）：77-106.
8	Lancaster N，Greeley R.Sediment volume in the north polar sand seas of Mars［J］.Journal of Geophysical Research，1990，95（B7）：10921.
9	McCoy F W，Nokleberg W J，Norris R M.Speculations on the origin of the Algodones Dunes，California［J］.Geological Society of America Bulletin，1967，78（8）：1039.
10	Warren A.Dune volume and trend measurements in the Nebraska Sand Hills［C］//Nebraska Academy of Sciences Proceedings.1968.
11	Warren A.Morphology and sediments of the Nebraska sand hills in relation to pleistocene winds and the development of aeolian bedforms［J］.The Journal of Geology，1976，84（6）：685-700.
12	Lettau H，Lettau K.Bulk transport of sand by the barchans of the Pampa de La Joya in Southern Peru［J］. Zeitschrift für Geomorphologie，1969，13：182-195.
13	Lettau H，Lettau K.Exploring the World's Driest Climate［M］.Madison，Wisconsin，USA：University of Wisconsin Press，1978.
14	Grove A T.Landforms and climatic change in the Kalahari and Ngamiland［J］.The Geographical Journal，1969，135（2）：191.
15	White K，Bullard J，Livingstone I，et al.A morphometric comparison of the Namib and southwest Kalahari dunefields using ASTER GDEM data［J］.Aeolian Research，2015，19：87-95.
16	Lancaster N.The Namib Sand Sea：Dune Forms，Processes and Sediments［M］.Rotterdam，Netherlands：Balkema，1989.
17	Lancaster N.Geomorphology of Desert Dunes［M］.London，UK：Routledge，1995.
18	Bullard J E，White K，Livingstone I.Morphometric analysis of aeolian bedforms in the Namib Sand Sea using ASTER data［J］.Earth Surface Processes and Landforms，2011，36（11）：1534-1549.
19	Lancaster N.The development of large aeolian bedforms［J］.Sedimentary Geology，1988，55（1）：69-89.
20	Breed C S，Fryberger S G，Andrews S，et al.Regional studies of sand seas using Landsat （ERTS） imagery［M］//Mckee E D.A Study of Global Sand Seas.Washington，USA：U.
	Survey S.Geological，1979：305-398.
21	Lancaster N.Dune morphology and dynamics［M］//Abrahams A D， Parsons A J.Geomorphology of Desert Environments.Dordrecht，Netherlands：Springer，1994.
22	Rubin D M.Factors determining desert dune type［J］.Nature，1984，309（5963）：91-92.
23	Fryberger S G，Ahlbrandt T S.Mechanisms for the formation of eolian sand seas［J］.Zeitschrift für Geomorphologie，1979，23：440-460.
24	Bagnold R A.The Physics of Blown Sand and Desert Dunes［M］.Dordrecht，Netherlands：Springer，1941.
25	Lü P，Clément N，Dong Z，et al.Emergence of oblique dunes in a landscape-scale experiment［J］.Nature Geoscience，2014，7（2）：99-103.
26	Dong Z，Hu G，Qian G，et al.High-altitude aeolian research on the Tibetan Plateau［J］.Reviews of Geophysics，2017，55（4）：864-901.
27	Lü P，Narteau C，Dong Z，et al.Unravelling raked linear dunes to explain the coexistence of bedforms in complex dunefields［J］.Nature Communications，2017，8（1）：1-9.
28	Lü P，Dong Z，Rozier O.The combined effect of sediment availability and wind regime on the morphology of aeolian sand dunes［J］.Journal of Geophysical Research：Earth Surface，2018，123（11）：2878-2886.
29	陈发虎，傅伯杰，夏军，等.近70年来中国自然地理与生存环境基础研究的重要进展与展望［J］.中国科学：地球科学，2019，49（11）：1659-1696.
30	Hugenholtz C H，Levin N，Barchyn T E，et al.Remote sensing and spatial analysis of aeolian sand dunes：a review and outlook［J］.Earth-Science Reviews，2012，111（3/4）：319-334.
31	Yang X，Scuderi L，Liu T，et al.Formation of the highest sand dunes on Earth［J］.Geomorphology，2011，135（1/2）：108-116.

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