[1] Becerril-Pina R, Alberto Mastachi-Loza C, Gonzalez-Sosa E et al. . 2015. Assessing desertification risk in the semi-arid highlands of central Mexico. Journal of Arid Environments, 120: 4-13. doi:
10.1016/ j.jaridenv.2015.04.006.
[2] Chen J, Zhang Y. 1996. Disscussion on reliation between humimity index and aridity degree. Journal of Desert Research, 16(1): 79-82. (in Chinese)
[3] Corwin D, Lesch S. 2003. Application of soil electrical conductivity to precision agriculture. Agronomy Journal, 95(3): 455-471.
[4] Golian S, Saghafian B, Sheshangosht S et al. . 2010. Comparison of classification and clustering methods in spatial rainfall pattern recognition at Northern Iran. Theoretical and Applied Climatology, 102(3-4): 319-329.
[5] Clinton, Nicholas, and Peng Gong. 2013. MODIS detected surface urban heat islands and sinks: Global locations and controls. Remote Sensing of Environment, 134: 294-304. doi:
10.1016/j.rse.2013.03.008.
[6] Han J. 2012. Change of fractional vegetation cover in northeast Asia from 2000 to 2011. In: Graduate School of the Chinese Academy of Sciences (Northeast Institute of Geography and Agricultural Ecology). Changchun. (in Chinese)
[7] Huang. 2012. Study on the soil and water conservation forest configuring technology in Yangtze river basin based on soil and water conservation. In: Huazhong Agricultural University. Wuhan. (in Chinese)
[8] Helldén U, Tottrup C. 2008. Regional desertification: A global synthesis. Global and Planetary Change, 64(3-4): 169-176. doi:
10.1016/j. gloplacha. 2008.10.006.
[9] Hornung M, Bull K R, Cresser M et al. . 1995. The sensitivity of surface waters of great-britain to acidification predicted from catchment characteristics. Environmental Pollution, 87(2): 207-214. doi:
10.1016/ 0269-7491(94)p2608-c.
[10] Jenks G F. 1967. The data model concept in statistical mapping. International Yearbook of Cartography, 7(1): 186-190.
[11] Jiang B. 2013. Head/tail breaks: a new classification scheme for data with a heavy-tailed distribution. The Professional Geographer, 65(3): 482-494.
[12] Köhl M, Lister A, Scott C T et al. . 2011. Implications of sampling design and sample size for national carbon accounting systems. Carbon Balance and Management, 6(1): 1-20.
[13] Li C, Ma J, Tang Z et al. . 2011. GIS based evaluation on intensity of freeze-thaw erosion in head water region of the three river source area. Soil and Water Conservation in China, (04): 41-43. (in Chinese)
[14] Li H, Liu S, Zhong X et al. . 2005. GIS based sensitivity evaluation on freeze thaw erosion in Tibet. Soil and Water Conservation in China, (07): 44-46. (in Chinese)
[15] Li X, Fang C, Huang J et al.. 2003. The urban land use transformations and associated effects on ecological environmentalal in northwest china arid region:a case study in ehxi region, gansu province. Quaternary Sciences, 23(3): 280-290. (in Chinese)
[16] Lieth H, Box E. 1972. Evapotranspiration and primary productivity; CW Thornthwaite memorial model. Publications in Climatology, 25(2): 37- 46.
[17] Liu J, Gao J, Ma S et al.. 2015. Comprehensive evaluation of ecological environmental sensitivity in Inner Mongolia, China. China Environmental Science, 35(2): 591-598. (in Chinese)
[18] Liu K, Ouyang Z, Wang X et al.. 2003. Ecological environmental sensitivity and its spatial distribution in Gansu Province. Acta Ecologica Sinica, 23(12): 2711-2718. (in Chinese)
[19] Ma B, Yi J. 2011. Analysis on sensitivity of soil salinization in the plain area of Heilongjiang Province. Enuivonmental Science and Mangement, 36(5): 133-135. (in Chinese)
[20] Mamatsawut, Tashpola T, Ding J et al.. 2012. A GIS-based assessment on sensitivity of soil salinization in arid areas: a case study of the Ugan- Kuqa river delta. Resources Science, 34(2): 353-358. (in Chinese)
[21] Marion G, Babcock K. 1976. Predicting specific conductance and salt concentration in dilute aqueous solutions. Soil Science, 122(4): 181-187.
[22] Martin S W, Michel P, Holt J et al.. 2003. Geographical and temporal distribution of human giardiasis in Ontario, Canada. International Journal of Health Geographics, 2(1): 5.
[23] Ouyang Z, Wang, Xiaoke, Miao, Hong. 2000. China's ecological environmental sensitivity and its spatial heterogeneity. Acta Ecologica Sinica, 20(1): 9-12. (in Chinese)
[24] Pan F, Tian C, Shao F et al.. 2012. Evaluation of ecological sensitivity in Karamay, Xinjiang, China. Journal of Geographical Sciences, 22(2): 329-345. doi:
10.1007/s11442-012-0930-5. (in Chinese)
[25] Pan J, Dong X. 2006. GIS-based assessment and division on ecological environmental sensitivity in the Heihe river basin. Journal of Natural Resources, 21(2): 267-273. (in Chinese)
[26] Pan J, Feng Z. 2010. Use of USLE/GIS technology to assess soil water erosion in Chinese Loess Hilly and Gully Region: a case study of the Weigou River basin, Gansu Province, China. Intelligent Automation and Soft Computing, 16(6): 857-867.
[27] Pan J, Wen Y. 2014. Estimation of soil erosion using RUSLE in Caijiamiao watershed, China. Natural Hazards, 71(3): 2187-2205. doi:
10.1007/ s11069-013-1006-2.
[28] Pradhan B, Chaudhari A, Adinarayana J et al.. 2012. Soil erosion assessment and its correlation with landslide events using remote sensing data and GIS: a case study at Penang Island, Malaysia. Environmental Monitoring and Assessment, 184(2): 715-727. doi:
10.1007/s10661- 011-1996-8.
[29] Qiao Q, Gao J, Wang W et al.. 2008. Method and application of ecological vulnerability assessment. Research of Environmental Sciences, 21(5): 117-123. (in Chinese)
[30] Rhoades J D, Corwin D L, Lesch S M. 1999. Geospatial measurements of soil electrical conductivity to assess soil salinity and diffuse salt loading from irrigation. Assessment of non-point source pollution in the vadose zone: 197-215.
[31] Shi D, Liang Y. 2002. Evaluation and conservation of fragile ecoligical environment in China. Journal of Soil and Water Conservation, 16(1): 6-10. (in Chinese)
[32] Shi Z, Tao H, Liu S et al.. 2012. Research of freeze-thaw erosion in the Three-River-Source area based on GIS. Transactions of the Chinese Society of Agricultural Engineering, 28(19): 214-221, 300. (in Chinese)
[33] Sun D, Zhang J, Zhu C et al.. 2012a. An assessment of China°s ecological environment quality change and its spatial variation. Acta Geographica Sinica, 67(12): 1599-1610. (in Chinese)
[34] Sun H, Zheng D, Yao T et al.. 2012b. Protection and construction of the national ecological security shelter zone on Tibetan plateau. Acta Geographica Sinica, 67(1): 3-12. (in Chinese)
[35] Tao H, Gao P, Zhong X. 2006. A study of regional ecological environmentalal vulnerability A case of "One - River - Two - Tributaries", Tibet. Journal of Mountain Science, 24(6): 761-768. (in Chinese)
[36] Wang W, Jiao J. 1996. Qutantitive evaluation on factors influencing soil erosion in China. Bulletin of Soil and Water Conservation, 16(5): 1-20. (in Chinese)
[37] Wang X. 2014. Exploration of observation on freeze-thaw erosion in Tibet Plateau. Soil and Water Conservation in China, (11): 51-53. (in Chinese)
[38] Wang X, Zhiyun O, Xiao H et al.. 2001. Distribution and division of sensitivity to water-caused soil loss in China. Acta Ecologica Sinica, 21(1): 14-14. (in Chinese)
[39] Wiebe B, Eilers R, Eilers W et al.. 2007. Application of a risk indicator for assessing trends in dryland salinization risk on the Canadian Prairies. Canadian Journal of Soil Science, 87(Special Issue): 213-224.
[40] Wischmei W H, Mannerin J V. 1969. Relation of soil properties to its erodibility. Soil Science Society of America Proceedings, 33(1): 131-137.
[41] Yan L, Xu X, Xie Z et al.. 2009. Integrated assessment on ecological sensitivity for Beijing. Acta cologica Sinica, 29(6): 3117-3125. (in Chinese)
[42] Yoder D, Lown J. 1995. The future of RUSLE: inside the new Revised Universal Soil Loss Equation. Journal of Soil and Water Conservation, 50(5): 484-489.
[43] Yu B, Lu C. 2011. Assessment of ecological vulnerability on the Tibetan Plateau. Geographical Research, 30(12): 2289-2295. (in Chinese)
[44] Yu F, Li X, Wang H. 2014. Optimization of land use pattern based on eco- security: a case study in the huangfuchuan watershed. Acta Ecologica Sinica, 34(12): 3198-3210. (in Chinese)
[45] Zhang J, Liu S, Yang S. 2007. The classification and assessment of freeze- thaw erosion in Tibet. Journal of Geographical Sciences, 17(2): 165- 174. doi:
10.1007/s11442-007-0165-z.
[46] Zhong X, Liu S, Wang X et al.. 2006. A research on the protection and construction of the state ecological safe shelter zone on the Tibet plateau. Journal of Mountain Science, 24(2): 129-136. (in Chinese)
[47] Zhu H, Ma Y X, Yan L C et al.. 2007. The relationship between geography and climate in the generic-level patterns of Chinese seed plants. Acta Phytotaxonomica Sinica, 45(2): 134-166.
[48] Zhu L, Whalley W B, Wang J. 1997. A simulated weathering experiment of small free granite blocks under freeze-thaw conditions. Journal of Glaciology and Geocryology, 19(4): 312-320. (in Chinese)