Hydroclimatological changes in the Bagmati River Basin, Nepal

doi:10.1007/s11442-013-1032-8

Abstract

Abstract:

Study on hydroclimatological changes in the mountainous river basins has attracted great interest in recent years. Changes in temperature, precipitation and river discharge pattern could be considered as indicators of hydroclimatological changes of the river basins. In this study, the temperatures (maximum and minimum), precipitation, and discharge data from 1980 to 2009 were used to detect the hydroclimatological changes in the Bagmati River Basin, Nepal. Simple linear regression and Mann-Kendall test statistic were used to examine the significant trend of temperature, precipitation, and discharge. Increasing trend of temperature was found in all seasons, although the change rate was different in different seasons for both minimum and maximum temperatures. However, stronger warming trend was found in maximum temperature in comparison to the minimum in the whole basin. Both precipitation and discharge trend were increasing in the pre-monsoon season, but decreasing in the post-monsoon season. The significant trend of precipitation could not be observed in winter, although discharge trend was decreasing. Furthermore, the intensity of peak discharge was increasing, though there was not an obvious change in the intensity of maximum precipitation events. It is expected that all these changes have effects on agriculture, hydropower plant, and natural biodiversity in the mountainous river basin of Nepal.

Key words: Bagmati River Basin, hydroclimatological change, temperature, precipitation, discharge

Yam Prasad DHITAL, TANG Qiuhong, SHI Jiancheng. Hydroclimatological changes in the Bagmati River Basin, Nepal[J]., 2013, 23(4): 612-626.

References

Cao L, Zhang Y, Shi Y, 2011.Climate change effect on hydrological processes over the Yangtze River Basin. Quaternary International, 244: 202-210.
Dhital Y P, Kayastha R B, Eslamian S, 2011. Precipitation and discharge pattern analysis: A case study of Bagmati River Basin, Nepal. Journal of Flood Engineering, 2(1): 49-60.
Dhorde A, Dhorde A, Gadgil A S, 2009. Long-term temperature trends at four largest cities of India during the twentieth century. Journal of Indian Geophysical Union 13(2): 85-97.
Dore M H I, 2005. Climate change and changes in global precipitation patterns: What do we know? Environment International, 31: 1167-1181.
Dulal K, Takeuchi K, Ishidaira H, 2006. A framework for the analysis of uncertainty in the measurement of precipitation data: A case study for Nepal. Agricultural Engineering International, 8: 1-16.
Dunne S S, Lynch P, Grath R M et al., 2008. The impacts of climate change on hydrology in Ireland. Journal of Hydrology, 356: 28-45.
DWIDP, 2005. Preparation of water induced hazard maps of Bagmati River Basin, Vol. I (Main Report). Department of Water Induced Disaster Prevention (DWIDP), Kathmandu, 109pp.
Fujita K, Nakazawa F, Rana B, 2001. Glaciological observations on Rikha Samba Glacier in Hidden Valley, Nepal Himalayas, 1998 and 1999. Bulletin of Glaciological Research, 18: 31-35.
Gautam M R, Acharya K, Tuladhar M K, 2010. Upward trend of stream flow and precipitation in a small, non-snow-fed, mountainous watershed in Nepal. Journal of Hydrology, 387: 304-311.
Gilbert R O, 1987. Statistical Methods for Environmental Pollution Monitoring. New York: Van Nostrand Reinhold.
Hannaha D M, Kansakar S R, Gerrard A J et al., 2005. Flow regimes of Himalayan rivers of Nepal: Nature and spatial patterns. Journal of Hydrology, 308: 18-32.
Hirsch R M, Alexander R B, Smith R A, 1991. Selection of methods for the detection and estimation of trends in water quality. Water Resources Research, 27: 803-814.
Huth R, 1999. Testing for trends in data unevenly distributed in time. Theoretical and Applied Climatology, 64:151-162.
IPCC, 2007. Climate Change 2007: The Physical Science Basis, Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK and New York, NY, USA: Cambridge University Press, pp.996.
Jaagus J, 2006. Climatic changes in Estonia during the second half of the 20th century in relationship with changes in large-scale atmospheric circulation. Theoretical and Applied Climatology, 83: 77-88.
Jones P D, Moberg A, 2003. Hemispheric and large-scale surface air temperature variations: An extensive revision and an update to 2001. Journal of Climate, 16: 206-223.
Kendall MG, 1975. Rank Correlation Methods. London, UK: Charles Griffin.
Liu X, Chen B, 2000. Climatic warming in the Tibetan Plateau during recent decades. International Journal of Climatology, 20: 729-1742.
Loukas A, Quick M C, 1996. The effect of climate change on floods in British Columbia. Nordic Hydrology, 30:231-256.
Luterbacher J, Dietrich D, Xoplaki E et al., 2004. European seasonal and annual temperature variability, trends, and extremes since 1500. Science, 303: 1499-1503.
Maidment D R, 1993. Handbook of Hydrology. New York, NY: McGraw-Hill.
Smith L C, 2000. Trends in Russian Arctic river-ice formation and breakup, 1917 to 1994. Physical Geography,20(1): 46-56.
Mann H B, 1945. Nonparametric tests against trend. Econometrica, 13: 245-259.
Modarres R, Silva V P R, 2007. Rainfall trends in arid and semi-arid regions of Iran. Journal of Arid Environments, 70: 344-355.
Mosmann V, Castro A, Fraile R et al., 2004. Detection of statistically significant trends in the summer precipitation of mainland Spain. Atmospheric Research, 70: 43-53.
Owen L A, Robinson R, Benn D I et al., 2009. Quaternary glaciation of Mount Everest. Quaternary Science Reviews, 28: 1412-1433.
Partal T, Kahya E, 2006. Trend analysis in Turkish precipitation data. Hydrological Processes, 20: 2011-2026.
Poudel R C, 2002. Potential erosion map for Bagmati Basin, M.Sc. Thesis, Institute of Engineering, Pulchowk Campus, Kathmandu, Nepal.
Rio S, Penasa A, Fraile R, 2005. Analysis of recent climatic variations in Castile and Leon (Spain). Atmospheric Research, 73: 69-85.
Sabade S S, Kulkarni A, Kripalani R H, 2011. Projected changes in South Asian summer monsoon by multi-model global warming experiments. Theoretical and Applied Climatology, 103: 543-565.
Seko K, Yabuki H, Nakawo M et al., 1998. Changing surface features of Khumbu Glacier, Nepal Himalayas revealed by SPOT images. Bulletin of Glaciological Research, 16: 33-41.
Shakya, N M, 2003. Hydrological changes assessment and its impact on hydro power projects of Nepal. In: Draft Proceedings of the Consultative Workshop on Climate Change Impacts and Adaptation Options in Nepal's Hydropower Sector with a Focus on Hydrological Regime Changes Including GLOF, DHM and Asian Disaster Preparedness Center, Kathmandu.
Sharma R H, Shakya N M, 2006. Hydrological changes and its impact on water resources of Bagmati watershed, Nepal. Journal of Hydrology, 327: 315-322.
Shrestha A, Kostaschuk R, 2005. El Niño/Southern Oscillation (ENSO)-related variability in mean-monthly stream flow in Nepal. Journal of Hydrology, 308: 33-49.
Shrestha A B, Aryal R, 2011. Climate change in Nepal and its impact on Himalayan glaciers. Regional Environmental Change, 11(Suppl. 1): 65-77.
Shrestha A B, Wake C P, Dibb J E et al., 2000. Precipitation fluctuations in the Nepal Himalaya and its vicinity and relationship with some large scale climatological parameters. International Journal of Climatology, 20:317-327.
Shrestha A B, Wake C P, Mayewski P A et al., 1999. Maximum temperature trends in the Himalaya and its vicinity: An analysis based on temperature records from Nepal for the period 1971-94. Journal of Climate, 12:2775-2786.
Shrestha M S, Artan G A, Bajracharya S R et al., 2008.Using satellite-based rainfall estimates for stream flow modelling: Bagmati Basin. Journal of Flood Risk Management, 1: 89-99.
Tabari H, Marofi S, 2011. Changes of pan evaporation in the west of Iran. Water Resources Management, 25:97-111.
Tabari H, Talaee P H, 2011. Analysis of trends in temperature data in arid and semi-arid regions of Iran. Global and Planetary Change, 79: 1-10.
Walling D E, Fang D, 2003. Recent trends in the suspended sediment loads of the world's rivers. Global and Planetary Change, 39: 111-126.
Whitfield P H, Fraser D, Cohen S, 2003. Climate change impacts on water in Georgia Basin/Puget Sound. Canadian Water Resources Journal, 28(special issue): 523-529.
Yogacharya K S, Shrestha M L, 1997. A Report on climate change scenarios for Nepal. Prepared for the US Country Studies Program by the Centre for Research Team, Kathmandu, Nepal.
Zhang Q, Xu C Y, Zhang Z et al., 2009. Changes of temperature extremes for 1960-2004 in Far-West China. Stochastic Environmental Research and Risk Assessment, 23: 721-735.
Zhang S, Lu X X, 2009. Hydrological responses to precipitation variation and diverse human activities in a mountainous tributary of the lower Xijiang, China. Catena, 77: 130-142.

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