Abstract
Monitoring and analyzing changes in the extent of cultivated land may inform strategic decisions on issues of environmental and food security. The dry cropland area of 12000 km2 in the Three Gorges Reservoir Region (TGRR) of China is essential for feeding the local population of ≈20 million, but is highly prone to soil erosion, leading to the delivery of excessive amounts of sediment and associated pollutants to the Three Gorges Reservoir (TGR), and causing serious eco-environmental consequences. Against this background, this paper used Landsat images and a digital elevation model to analyze the altitudinal distribution of, and dynamic changes in, the area of dry cropland during the period 1990 to 2015. The results suggest that dry cropland was mainly distributed in the elevation range of 200-600 m. The dry cropland area decreased from 12525.37 km2 to 11796.27 km2 during the 25-year study period, including a particularly significant decrease in the rate of decrease from 6.93 km2/yr to 43.99 km2/yr after 2000. The largest decline in the dry cropland area occurred in the elevation range of 600-900 m. The transformations between dry cropland and forest revealed the impact of the TGR operation on the extent of dry cropland. A total of 528.79 km2 of dry cropland with slopes >25° were converted to forest after 2000, whereas a total of 642 km2 of forest was converted to dry cropland during the study period, and these conversions mainly occurred between the elevation of 200–900 m. These spatiotemporal changes in the dry cropland area are likely to raise new issues concerning food security in the TGRR.
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References
Cao YG, Bai ZK, Zhou W, et al. (2013) Forces driving changes in cultivated land and management countermeasures in the Three Gorges Reservoir Region, China. Journal of Mountain Science 10(01): 149–162. https://doi.org/10.1007/s11629-013-2240-5
Cao YG, Wang J, Cheng Y, et al. (2006) Research of changes in cultivated land around the reservoir area of Three Gorges. Progress in Geography 25(06): 117–125. (In Chinese) https://doi.org/10.11820/dlkxjz.2006.06.014
Cheng YX, Wang XZ, Guo JP, et al. (2012) The temporal-spatial dynamic analysis of China rice production. Scientia Agricultura Sinica 45(17): 3473–3485. (In Chinese) https://doi.org/10.3864/j.issn.0578-1752.2012.17.003
Collins AL, Stutter M, Kronvang B (2014) Mitigating diffuse pollution from agriculture: international approaches and experience. Science of the Total Environment 468-469(25): 1173–1177. https://doi.org/10.1016/j.scitotenv.2013.11.001
Cui P, Ge YG, Lin YM (2011) Soil erosion and sediment control effects in the three gorges reservoir region, china. Journal of Resources and Ecology 2(4): 289–297. https://doi.org/10.3969/j.issn.1674-764x.2011.04.001
Cui X, Zhang L, Zhu L, et al. (2012) Changes of landscape pattern and its characteristics in Kaixian County before and after impoundment of Three Gorges Dam Project. Transactions of the Chinese Society of Agricultural Engineering 28(4): 227–234. (In Chinese) https://doi.org/10.3969/j.issn.1002-6819.2012.04.038
Deng H, Shao JA, Wang J L, et al. (2016) Land use driving forces and its future scenario simulation in the Three Gorges Reservoir Region using clue-s model. Acta Geographica Sinica 71(11): 1979–1997. (In Chinese) https://doi.org/10.11821/dlxb201611009
Feng ZM, Yang YZ, Zhang YQ, et al. (2005) Grain-for-green policy and its impacts on grain supply in west China. Land Use Policy 22(4): 301–312. https://doi.org/10.1016/j.landusepol.2004.05.004
Fu BJ, Wu BF, Xu ZH, et al. (2010) Three Gorges project: Efforts and challenges for the environment. Progress in Physical Geography 34(6): 741–754. https://doi.org/10.1177/0309133310370286
Gao X, Zeng Y, Wang JW, et al. (2010) Immediate impacts of the second impoundment on fish communities in the Three Gorges Reservoir. Environmental Biology of Fishes 87(2): 163–173. https://doi.org/10.1007/s10641-009-9577-1
Geng R, Zhang GH, Ma QH, et al. (2017) Soil resistance to runoff on steep croplands in Eastern China. Catena 152: 18–28. https://doi.org/10.1016/j.catena.2017.01.002
Guan DJ, Su WC (2006) Studies on the optimal utilization models of land resources in the immigrant settlement region of the Three Gorges Reservoir area. Research of Soil & Water Conservation 13(6): 236–238. (In Chinese) https://doi.org/10.1016/S1872-2032(06)60050-4
Honisch M, Hellmeier C, Weiss K (2002) Response of surface and subsurface water quality to land use changes. Geoderma 105(3-4): 277–298. https://doi.org/10.1016/s0016-7061(01)00108-2
Komarek AM, Shi X, Heerink N (2014) Household-level effects of China's sloping land conversion program under price and policy shifts. Land Use Policy 40: 36–44. https://doi.org/10.1016/j.landusepol.2013.04.013
Li Y, Yu H, Chappell A, et al. (2014) How much soil organic carbon sequestration is due to conservation agriculture reducing soil erosion? Soil Research 52(7): 717–726. https://doi.org/10.1071/SR14078
Li YC, Liu CX, Yuan XZ (2009) Spatiotemporal features of soil and water loss in Three Gorges Reservoir Area of Chongqing. Journal of Geographical Sciences 19(1): 81–94. https://doi.org/10.1007/s11442-009-0081-5
Liu JY, Liu ML, Tian HQ, et al. (2005) Spatial and temporal patterns of China's cropland during 1990–2000: An analysis based on Landsat TM data. Remote Sensing of Environment 98(4): 442–456. https://doi.org/10.1016/j.rse.2005.08.012
Liu Y, Fang F, Li Y (2014) Key issues of land use in China and implications for policy making. Land Use Policy 40(40): 6–12. https://doi.org/10.1016/j.landusepol.2013.03.013
Liu YJ, Ni JP, Zhang Y, et al. (2015) Analysis of effects on water interception and nutrient observation from citrus intercropping in hilly area of Chongqing Municipality. Journal of Soil & Water Conservation 29(1): 226–230. (In Chinese) https://doi.org/10.13870/j.cnki.stbcxb.2015.01.043
Liu T, Shao JA (2016) Spatial and temporal variation of soil erosion under different land uses in the Three Gorges Reservoir Region. Science of Soil and Water Conservation 14(03): 1–9. (In Chinese) https://doi.org/10.16843/j.sswc.2016.03.001
Morgan TKKB, Sardelic DN, Waretini A F (2012) The Three Gorges project: How sustainable? Journal of Hydrology 460-461(5): 1–12. https://doi.org/10.1016/j.jhydrol.2012.05.008
Ouyang W, Hao FH, Song KY, et al. (2011) Cascade dam-induced hydrological disturbance and environmental impact in the upper stream of the Yellow River. Water Resources Management 25: 913–927. https://doi.org/10.1007/s11269-010-9733-6
Skog KL, Steinnes M (2016) How do centrality, population growth and urban sprawl impact farmland conversion in Norway? Land Use Policy 59:185–196. https://doi.org/10.1016/j.landusepol.2016.08.035
Shao HY, Xian W, Yang WN, et al. (2008) Land use/cover change during lately 50 years in Three Gorges Reservoir Region. Chinese Journal of Applied Ecology 19(2): 453–458. (In Chinese)
Shao JA, Zhang SC, Wei C F (2013) Remote sensing analysis of land use change in the Three Gorges Reservoir area, based on the construction phase of large-scale water conservancy project. Geographical Research 34(4): 496–504. (In Chinese) https://doi.org/10.11821/dlyj201312014
Shen Z, Chen L, Hong Q, et al. (2013) Assessment of nitrogen and phosphorus loads and causal factors from different land use and soil types in the Three Gorges Reservoir area. Science of the Total Environment 454-455(5): 383–392. https://doi.org/10.1016/j.scitotenv.2013.03.036
Tan Y, Bryan B, Hugo G (2005) Development, land-use change and rural resettlement capacity: a case study of the Three Gorges Project, China. Australian Geographer 36: 201–220. https://doi.org/10.1080/00049180500153484
Tian G, Yang Z, Zhang Y (2007) The spatio-temporal dynamic pattern of rural residential land in China in the 1990s using Landsat TM images and GIS. Environmental Management 40(5): 803–813. https://doi.org/10.1007/s00267-006-0048-6
Wang LJ, Wu L, Hou XY, et al. (2016) Role of reservoir construction in regional land use change in Pengxi River basin upstream of the Three Gorges Reservoir in China. Environmental Earth Sciences 75(13): 1–15. https://doi.org/10.1007/s12665-016-5758-3
Xu HQ (2005) A Study on information extraction of water body with the modified normalized difference water index (MNDWI). Journal of Remote Sensing 9(5): 589–595. (In Chinese) https://doi.org/10.3321/j.issn:1007-4619.2005.05.012
Yang F (2014) Population change and its impact on economic growth in the Three Gorges reservoir region. Master thesis, Chongqing Technology and Business University, Chongqing pp: 27. (In Chinese)
Zhang JX, Liu ZJ, Sun XX (2009) Changing landscape in the Three Gorges Reservoir Region of Yangtze River from 1977 to 2005: Land use/land cover, vegetation cover changes estimated using multi-source satellite data. International Journal of Applied Earth Observation & Geoinformation 11(6): 403–412. https://doi.org/10.1016/j.jag.2009.07.004
Zhang L, Wu BF, Zhu L, et al. (2011) Cropland spatio-temporal change and driving force in Three Gorges Reservoir Area. Journal of Geo-Information Science 13(3): 297–304. (In Chinese) https://doi.org/10.3724/SP.J.1047.2011.00297
Zhang GL, Xiao XM, Biradar CM, et al. (2016) Spatiotemporal patterns of paddy rice croplands in China and India from 2000 to 2015. Science of the Total Environment 579: 82. https://doi.org/10.1016/j.scitotenv.2016.10.223
Zhang QF, Lou ZP (2011) The environmental changes and mitigation actions in the Three Gorges Reservoir region, China. Environmental Science & Policy 14(8): 1132–1138. https://doi.org/10.1016/j.envsci.2011.07.008
Zhao QH, Liu SL, Dong SK (2010) Effect of dam construction on spatial-temporal change of land use: a case study of Manwan, Lancang River, Yunnan, China. Procedia Environmental Sciences 2(6): 852–858. https://doi.org/10.1016/j.proenv.2010.10.096
Zhao QH, Liu SL, Deng L, et al. (2013) Determining the influencing distance of dam construction and reservoir impoundment on land use: A case study of Manwan dam, Lancang River. Ecological Engineering 53(3): 235–242. https://doi.org/10.1016/j.ecoleng.2012.12.050
Zhong B, Tang ZC (2001) Soil and water loss and its control in Three Gorges Region. Research of Soil and Water Conservation 8(2): 147–149. (In Chinese) https://doi.org/10.3969/j.issn.1005-3409.2001.02.037
Acknowledgments
This work was supported by the National Natural Science Foundation of China (41201273, 41771321, and 41571278) and the Science and Technology Service Network Initiative of CAS (KFJ-SWSTS-175). The contribution of ALC was funded by |the ^UK Biotechnology and Biological Sciences Research Council (BBSRC) institute strategic programme grant BBS/E/C/000I0330 (Soil to Nutrition project 3).
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Wang, Mf., Tian, Fx., He, Xb. et al. Dry cropland changes in China's Three Gorges Reservoir Region during the period 1990 to 2015. J. Mt. Sci. 17, 516–527 (2020). https://doi.org/10.1007/s11629-019-5598-1
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DOI: https://doi.org/10.1007/s11629-019-5598-1