Assessing the Impact of Drought on Agricultural Production and Proposing the Conversion of Suitable Cropping Systems in Thach Ha District, Ha Tinh Province
Main Article Content
Abstract
Drought has occurred in most communes in Thach Ha district with a mild level. The drought is milder in the Eastern coastal communes of the district while the Western and Southwestern communes of the district are more severely affected by drought. Drought has a significant impact on agricultural production, drought makes 56.3% of households surveyed lose completely (losing completely or having to replant), 29.8% of households lost most seasons and more than 10% of households lose their crops in half. In order to overcome the ongoing drought situation and to effectively use the agricultural land resources of Thach Ha district, this study uses a method of Land suitability classifications considering the impact of drought and Thach's development orientation is the basis for the proposed the conversion of suitable cropping systems. The results of the proposed land use of Thach Ha district are as follows: The paddy rice land area (2-3 paddy rice crops per year) is 8,674.93 ha, accounting for 24.52% of the natural land area; Paddy rice and annual crops (1 paddy rice crop and 1-2 annual crops) covers an area of 1,691.41 ha, accounting for 4.78% of natural land area; Annual crops and short-term industrial plants with an area of 2,911.32 ha, accounting for 8.23% of natural land area; agro-forestry land with an area of 1,695.29 hectares, accounting for 4.79% of natural land area; aquaculture land has an area of 1,803.87 ha, accounting for 5.1% of the natural land area; forest land (production forest and coastal protection forest) covers an area of 8,643.71 ha, accounting for 24.42% of natural land area.
References
[2] M.V.K. Sivakumar, Impacts of Natural Disasters in Agriculture, Rangeland and Forestry: an Overview, in M.V.K. Sivakumar;, R.P. Motha, H.P. Das (Eds.), Narural Disasters and Extreme Events in Agriculture: Impacts and Mitigation, Springer-Verlag Berlin Heidelberg, New York, 2005, pp. 1-23.
[3] United Nations, Disaster risk reduction: 2007 Global Review. https://www.unisdr.org/files/ 1130GlobalReview2007.pdf, 2018 (accesed 24 July 2018).
[4] IPCC, Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. https://www.ipcc.ch/site/assets/uploads/2018/05/ar4_wg1_full_report-1.pdf (accesed 22 June 2018)
[5] Ha Tinh Statistics Office, Ha Tinh Statistical Yearbook 2017, Statiscal Publishing House, Hanoi, 2017.
[6] People's Committee of Ha Tinh Province, Action plan to respond to climate change of Ha Tinh province, Ha Tinh, 2011. (in Vietnamese).
[7] C.J. Kim, M.J. Park, and J. H. Lee, Analysis of climate change impacts on the spatial and frequency patterns of drought using a potential drought hazard mapping aproach. International Journal of Climatology. 34 (2014) 61-80. https://doi.org/10.1002/joc.3666.
[8] L.T. Hieu, Studies assessing drought the Red River Delta, Master Thesis, VNU University of Science, Hanoi, 2012. (in Vietnamese).
[9] L. Sam, N.D. Vuong, Study selection formula drought index and applied to calculate the frequency of droughts in the region in Ninh Thuan, in: Collection of scientific and technological results, The Southern Institute of Water Resources Research, Ho Chi Minh city, 2008. (in Vietnamese).
[10] B.Q. Toan, Research assessment and reclaimed land use planning in Vietnam, in: Scientific and technical research journal (1982-1985), National Institute of Agricultural Project and Planning, Hanoi, 1986. (in Vietnamese).
[11] T.A. Phong, Assess the status of land use in view of ecology and sustainable development, Agricultural Publishing House, Hanoi, 1995. (in Vietnamese).
[12] V.T.B Nam, Application of GIS techniques and Automatic land evaluation system (Ales) to assess natural land suitability for rice land in Soc Trang province - Mekong Delta, in: Scientific research results journal (1996 - 2001), National Institute of Agricultural Project and Planning, Hanoi, 2001. (in Vietnamese).
[13] National Institute of Agricultural Project and Planning, Instruction for agricutural production land evaluation (TCVN 8409:2012), Hanoi, 2012. (in Vietnamese).
[14] Center for Responding to Climate Change, Climate Database in period 2007-2016 of Ha Tinh Province, Vietnam, Hanoi, 2017. (in Vietnamese).
[15] Ha Tinh Department of Natural Resources and Enviroment, Database and Land Use Map in 2017 of Thach Ha District, Ha Tinh, 2018. (in Vietnamese).
[16] National Institute of Agricultural Project and Planning, Soil map of Ha Tinh Province, Scale 1/100.000, Hanoi, 2004. (in Vietnamese).
[17] FAO. ETo calculator version 3.1. http://www. fao.org/fileadmin/user_upload/faowater/Applications/EToCalculator64Bit.zip, 2009 (accesed 24 June 2018).
[18] N.X. Hai, N.Q. Viet, P.A. Hung, N.T. Dong, L.T.K. Dung, The impact of climate changes on agricultural production activities at the coastal areas in Thach Ha district, Ha Tinh province, Scientific and Technical Hydro - Meteorological Journal, 677* (2017) 53-57 (in Vietnamese).
[19] D.G. Rossiter, ALES Software 4.65. http://www. css.cornell.edu/faculty/dgr2/research/ales/ftp/index.html, 2007 (accesed 22 June 2018).
[20] People's Committee of Ha Tinh Province, Project on Restructuring the agricultural sector towards increasing added value and Sustainable development, in association with building a new Countryside, Ha Tinh, 2014.