Abstract:Soil water content is a key parameter in monitoring drought. In recent years, a lot of work has been done on monitoring soil water content based on hyperspectral remotely sensed data both at home and abroad. In the present review, theories, advantages and disadvantages of the monitoring methods using different bands are introduced first. Then the unique advantages, as well as the problems, of the monitoring method with the aid of hyperspectral remote sensing are analyzed. In addition, the impact of soil water content on soil reflectance spectrum and the difference between values at different wavelengths are summarized. This review lists and summarizes the quantitative relationships between soil water content and soil reflectance obtained through analyzing the physical mechanism as well as through statistical way. The key points, advantages and disadvantages of each model are also analyzed and evaluated. Then, the problems in experimental study are pointed out, and the corresponding solutions are proposed. At the same time, the feasibility of removing vegetation effect is discussed, when monitoring soil water content using hyperspectral remote sensing. Finally, the future research trend is prospected.
Key words:Hyperspectral remote sensing;Soil water content;Reflectance
[1] Blyth E M, Dolman A J, Wood N. The Quarterly Journal of the Royal Meteorological Society, 1993, 119(511): 423. [2] Bach M, Mauser W. Proceedings of IGARSS′94, Pasadena, IEEE, 1994, 4: 2354. [3] Engman E T, Chauhan N. Remote Sens. Environ., 1995, 51(1): 189. [4] Schmugge T J, Gloersen P, Wilheit T. J. Geophys. Res., 1974, 79(2): 317. [5] Bindlisha R, Barros A P. Remote Sens. Environ., 2001, 76: 130. [6] Baronti S, Del F, Ferrazzoli P et al. Internation Journal of Remote Sensing, 2001, 16(14): 2639. [7] Price J C. Remote Sens. Environ., 1985, 18: 59. [8] Jackson R D, Idso S B, Reginato R J et al. Water Resour Res., 1981, 17: 1133. [9] Sandholt I, Rasmussen K, Andersen J. Remote Sens. Environ., 2002, 79(2): 213. [10] Kogan F N. Int. J. Remote Sens., 1990, 11: 1405. [11] CHEN Wei-ying, XIAO Gan-guang, SHENG Yong-wei(陈维英, 肖乾广, 盛永伟). Journal of Remote Sensing(遥感学报), 1994, 8(2): 106. [12] MAO Xue-sen, ZHANG Yong-qiang, SHEN Yan-jun (毛学森, 张永强, 沈彦俊). Agricultural Research in the Arid Areas(干旱地区农业研究), 2002, 20(1): 69. [13] Jackson R D. Remote Sens. Environ., 1983, 13: 187. [14] Hunt G R. Electromagnetic Radiation: the Communication Link in Remote Sensing. in: Remote Sensing in Grolog., 1980. [15] Bach H, Verhoef W. Geoscience and Remote Sensing Symposium, 2003, IGARSS’03, Proceedings, 2003 IEEE International, 2003: 1679. [16] Bowers A S, Smith J S. Soil Sci. Soc. Am. J, 1972, 36: 978. [17] Hoffer R M, Johannsen C J. Remote Sensing in Ecology. Athens GA: Univ. of Georgia Press, 1969. 1. [18] Ishida T, Ando H, Fukuhara M. Remote Sens Environ., 1991, 38(3): 173. [19] Stoner R E, Baumgardner M F. Soil Sci. Soc. Am. J, 1981, 45: 1161. [20] Baungardner M F, Silva L F, Biehl L L et al. Adv. Agron., 1985, 38: 1. [21] Liu W, Baret F, Gu X,et al. Remote Sens Environ., 2002, 81(2-3): 238. [22] Neema D L, Shah A, Patel A N. Int. J. Remote Sens., 1987, 8: 1209. [23] Patel A N, Neema D L, Shah A. Geotechnical Testing Journal, 1990, 13(2): 115. [24] DENG Ru-ru, TIAN Guo-liang, LIU Qin-huo(邓孺孺, 田国良, 柳钦火). Journal of Remote Sensing(遥感学报), 2004, 8(1): 75. [25] David B L, Gregory P A. Soil Sci. Soc. Am. J., 2002, 66(3): 722. [26] Etienne M, Henri D. Remote Sens Environ., 2001, 76(2): 173. [27] Angstrom A. Geografiske Annales, 1925, 7: 323. [28] Jacquemoud S, Baret F, Hanocq J F. Remote Sens. Environ., 1992, 41: 123. [29] Ni W, Li X. Remote Sens. Environ., 1999, 74: 113. [30] ZHU Yong-hao, DENG Ren-da, LU Ya-fei(朱永豪, 邓仁达, 卢亚非). Acta Pedologica Sinica(土壤学报), 1984,(2): 194. [31] WANG Jing, HE Ting, LI Yu-huan(王 静, 何 挺, 李玉环). Journal of Remote Sensing(遥感学报), 2005, 9(4): 438. [32] Liu W, Baret F, Gu X,et al. Int. J. Remote Sens., 2003, 24(10): 2069. [33] WANG Chang-zuo, WANG Ji-hua, WANG Jin-di(王昌佐, 王纪华, 王锦地). Remote Sensing Information(遥感信息), 2003,(4): 33. [34] Price J C. Remote Sens. Environ., 1990, 33: 113. [35] Price J C. Remote Sens. Environ., 1998, 64(3): 316. [36] Palacios-Orueta A, Ustin S L. Remote Sens. Environ., 1996, 57: 108. [37] Huan-Jun L, Yuan-Zhi Z, Xin-Le Z,et al. Pedosphere, 2009, 19: 532. [38] Hymer D C, Muran M S, Keefer TO. Soil. Sci. Soc. Am. J., 2000, 64: 319. [39] Keike B, Verhoef W. Geoscience and Remote Sensing Symposium, 2003. IGARSS’03. Proceedings. 2003 IEEE International 2003, 3: 1679. [40] LIU Pei-jun, LIU Lin(刘培君, 刘 琳). Journal of Remote Sensing(遥感学报), 1997, 1(2): 135. [41] SHAO Mei-zhen, XU Xi-ru(邵美珍, 徐希孺). Chinese Space Science and Technology (中国空间科学技术), 1989, 5: 63. [42] XU Xi-ru, ZHOU Lian-fang, ZHU Xiao-hong(徐希孺, 周莲芳, 朱晓红). Chinese Science Bulletin(科学通报), 1989, 34(12): 946. [43] WANG Xi-peng, ZHANG Yang-zhen(王喜鹏, 张养珍). Journal of Remote Sensing(遥感学报), 1998, 2(1): 51. [44] FAN Wen-jie, XU Xi-ru(范闻捷, 徐希孺). Progress in Natural Science(自然科学进展), 2005, 15(8): 993. [45] Foody G M. Int. J. Remote Sens., 1991, 12(7): 1461.