Assessment of stream flow variability in response to the changes in climate, rainfall, and water demands: assessing stream flow variability in Thiba sub-basin
International Journal of Energy and Water Resources - Trang 1-17 - 2023
Tóm tắt
Stream flow variability was evaluated in response to changes in climate, rainfall, and water demands. Water evaluation and planning system with monthly timesteps calculations was used to compute water situation, and parameter estimation tool used in calibration of the model. Model was calibrated using Nash–Sutcliffe efficiency, coefficient of determination, and Percent Bias, attaining values of 0.86, 0.85, and 6.64; while the validation coefficients were 0.90, 0.88, and 1.08, respectively. Climate evaluation scenarios under representative concentration pathway 4.5 and 8.5 predict mean rainfall to be 1420.1 mm and 1332.2 mm, and mean temperatures of 18.8 °C and 19.1 °C, respectively, at the end of 2050. The results show a non-significant increase in rainfall and significant increase in temperatures. Both pathways predict greatly variable decreasing mean discharge by the end of 2050. This variability is attributed to the increase in water demand and temperatures in the face of decreasing rainfall. The best-case and worst-case scenarios predict total water demands to increase to 201,903 and 204,302 billion cubic meters per year, respectively. Water consumption will increase from 77.0
$${\mathrm{m}}^{3}$$
per capita per day in 2021 to 85.2
$${\mathrm{m}}^{3}$$
per capita per day, and a 30% increase in unmet demands in all sectors. Results indicate that climate change will significantly impact water resources under the rising water demands, change of land uses, and varying discharge. Mitigation efforts will result in better flows compared to no intervention. Detailed study linking groundwater to surface water will help to understand the problem better.
Tài liệu tham khảo
Abdullahi, M., Mizutani, M., Tanaka, S., Goto, A., & Matsui, H. (2003). Changes in Water Management Practices in the Mwea Irrigation Scheme, Kenya from 1994 to 1998. Rural and Environment Engineering. https://doi.org/10.11408/jierp1996.2003.44_60
Asghar, A., Iqbal, J., Amin, A., & Ribbe, L. (2019). Integrated hydrological modeling for assessment of water demand and supply under socio-economic and IPCC climate change scenarios using WEAP in Central Indus Basin. Journal of Water Supply: Research and Technology-Aqua, 68(2), 136–148. https://doi.org/10.2166/aqua.2019.106
Awuor, C. B., Orindi, V. A., & Ochieng Adwera, A. (2008). Climate change and coastal cities: The case of Mombasa, Kenya. Environment and Urbanization, 20(1), 231–242. https://doi.org/10.1177/0956247808089158
Ayugi, B., Wen, W., & Chepkemoi, D. (2016). Analysis of Spatial and Temporal Patterns of Rainfall Variations over Kenya. Environmental Earth Sciences, 6, 69–83.
Baker, B. H. (1967). Geology of the Mount Kenya area. Nairobi: Geological Survey of Kenya.
Bell, B., Hersbach, H., Simmons, A., Berrisford, P., Dahlgren, P., Horányi, A., Muñoz-Sabater, J., Nicolas, J., Radu, R., Schepers, D., Soci, C., Villaume, S., Bidlot, J.-R., Haimberger, L., Woollen, J., Buontempo, C., & Thépaut, J.-N. (2021). The ERA5 global reanalysis: Preliminary extension to 1950. Quarterly Journal of the Royal Meteorological Society, 147(741), 4186–4227. https://doi.org/10.1002/qj.4174
Bhaga, T. D., Dube, T., Shekede, M. D., & Shoko, C. (2020). Impacts of climate variability and drought on surface water resources in Sub-Saharan Africa using remote sensing: A review. Remote Sensing, 12(24), 24. https://doi.org/10.3390/rs12244184
Chaudhry, S. (2021). Political economy of forest degradation and climate changes in Kenya: Case study of the Maasai Mau Forest. In: Handbook of climate change management, 1–17.
Cosgrove, W. J., & Loucks, D. P. (2015). Water management: Current and future challenges and research directions. Water Resources Research, 51(6), 4823–4839. https://doi.org/10.1002/2014WR016869
Dinku, T., Funk, C., Peterson, P., Maidment, R., Tadesse, T., Gadain, H., & Ceccato, P. (2018). Validation of the CHIRPS satellite rainfall estimates over eastern Africa. Quarterly Journal of the Royal Meteorological Society, 144(S1), 292–312. https://doi.org/10.1002/qj.3244
Flörke, M., Schneider, C., & McDonald, R. I. (2018). Water competition between cities and agriculture driven by climate change and urban growth. Nature Sustainability, 1(1), Article 1. https://doi.org/10.1038/s41893-017-0006-8
GoK. (2010). National climate change response strategy: Executive brief. Ministry of Environment and Mineral Resources, Government of Kenya (GoK), Nairobi.
Howells, M., Hermann, S., Welsch, M., Bazilian, M., Segerström, R., Alfstad, T., Gielen, D., Rogner, H., Fischer, G., van Velthuizen, H., Wiberg, D., Young, C., Roehrl, R. A., Mueller, A., Steduto, P., & Ramma, I. (2013). Integrated analysis of climate change, land-use, energy and water strategies. Nature Climate Change, 3(7), 7. https://doi.org/10.1038/nclimate1789
Huang, C., Chen, Y., Zhang, S., & Wu, J. (2018). Detecting, extracting, and monitoring surface water from space using optical sensors: A review. Reviews of Geophysics, 56(2), 333–360. https://doi.org/10.1029/2018RG000598
IFAD. (2002). Mount Kenya East Pilot Project for Natural Resource Management. IFAD. https://www.ifad.org/en/web/operations/-/project/1100001234. Accessed Sept 2023.
IWMI. (2016). Future proofing the Tana Basin. International Water Management Institute (IWMI). https://www.iwmi.cgiar.org/2016/05/future-proofing-the-tana-basin/. Accessed Sept 2023.
Karienye, D., Nduru, G., & Kamiri, H. (2021). Climate variability and adaptation among small holder banana farmers in mountain regions of Kenya. Geography Environment Sustainability. https://doi.org/10.24057/2071-9388-2019-27
Kasuni, S. M., & Kitheka, J. U. (2017). Modeling the impacts of land cover changes on stream flow response in Thiba River Basin in Kenya. Journal of Water Resources and Ocean Science, 6(1), 1. https://doi.org/10.11648/j.wros.20170601.11
KCIDP. (2018). Kirinyaga County Integrated Development plan 2018–2022. Devolution Hub. https://devolutionhub.or.ke///kirinyaga-county-integrated-development-plan-2018-2022/. Accessed Sept 2023.
Khamala, G. W., Makokha, J. W., Boiyo, R., & Kumar, K. R. (2022). Long-term climatology and spatial trends of absorption, scattering, and total aerosol optical depths over East Africa during 2001–2019. Environmental Science and Pollution Research, 29(40), 61283–61297. https://doi.org/10.1007/s11356-022-20022-6
Kitheka, J. U., Mwangi, S., & Mwendwa, P. K. (2019). The effect of rainfall variability and landuse/land cover change in a small tropical river basin in Kenya. International Journal of Hydrology. https://doi.org/10.15406/ijh.2019.03.00163
Kitheka, J. U., Obiero, M., & Nthenge, P. (2005). River discharge, sediment transport and exchange in the Tana Estuary, Kenya. Estuarine, Coastal and Shelf Science, 63(3), 455–468. https://doi.org/10.1016/j.ecss.2004.11.011
KNBS, K. N. B. of S. (2019). 2019 Kenya Population and Housing Census Volume I: Population by County and Sub-County.
Liu, J., Yang, H., Gosling, S. N., Kummu, M., Flörke, M., Pfister, S., Hanasaki, N., Wada, Y., Zhang, X., Zheng, C., Alcamo, J., & Oki, T. (2017). Water scarcity assessments in the past, present, and future. Earth’s Future, 5(6), 545–559. https://doi.org/10.1002/2016EF000518
Liu, Y., Feng, J., Yang, Z., Hu, Y., & Li, J. (2019). Gridded Statistical Downscaling Based on Interpolation of Parameters and Predictor Locations for Summer Daily Precipitation in North China. Journal of Applied Meteorology and Climatology, 58(10), 2295–2311. https://doi.org/10.1175/JAMC-D-18-0231.1
Maliva, R. (2021). Climate change and groundwater: planning and adaptations for a changing and uncertain future: WSP Methods in Water Resources Evaluation Series No. 6. Springer Nature.
Maraun, D. (2016). Bias correcting climate change simulations—A critical review. Current Climate Change Reports, 2(4), 211–220. https://doi.org/10.1007/s40641-016-0050-x
Miraji, M., Liu, J., & Zheng, C. (2019). The impacts of water demand and its implications for future surface water resource management: The case of Tanzania’s Wami Ruvu Basin (WRB). Water, 11(6), 6. https://doi.org/10.3390/w11061280
Moriasi, D., Arnold, J., Van Liew, M., Bingner, R., Harmel, R. D., & Veith, T. (2007). Model evaluation guidelines for systematic quantification of accuracy in watershed simulations. Transactions of the ASABE., 10(13031/2013), 23153.
Moriasi, D., Gitau, M., Pai, N., & Daggupati, P. (2015). Hydrologic and water quality models: Performance measures and evaluation criteria. Transactions of the ASABE (american Society of Agricultural and Biological Engineers), 58, 1763–1785. https://doi.org/10.13031/trans.58.10715
Morishima, W. (2022). Climatology: Seasonal changes of rainfall around mount kenya and its relation to atmospheric circulation. In K. Mizuno & Y. Otani (Eds.), Glaciers, nature, water, and local community in Mount Kenya (pp. 15–29). Springer. https://doi.org/10.1007/978-981-16-7853-0_2
Mumma, A., Lane, M., Kairu, E., Tuinhof, A., & Hirji, R. (2011). Kenya groundwater governance case study. http://hdl.handle.net/10986/17227. Accessed Sept 2023.
Mwangi, K. K., Musili, A. M., Otieno, V. A., Endris, H. S., Sabiiti, G., Hassan, M. A., Tsehayu, A. T., Guleid, A., Atheru, Z., Guzha, A. C., Meo, T. D., Smith, N., Makanji, D. L., Kerkering, J., Doud, B., & Kanyanya, E. (2020). Vulnerability of Kenya’s water towers to future climate change: An assessment to inform decision making in watershed management. American Journal of Climate Change. https://doi.org/10.4236/ajcc.2020.93020
Njogu, I. N. (2019). Streamflow variability and sediment yield in North-West upper Tana basin, Kenya [Thesis]. http://repository.seku.ac.ke/handle/123456789/4347. Accepted: 2019-02-07T07:40:16Z. Accessed Sept 2023.
Notter, B., MacMillan, L., Viviroli, D., Weingartner, R., & Liniger, H.-P. (2007). Impacts of environmental change on water resources in the Mt. Kenya region. Journal of Hydrology, 343(3), 266–278. https://doi.org/10.1016/j.jhydrol.2007.06.022
Oduor, B. O. (2017). Modeling impacts of agricultural land expansion on the streamflow regime: case study of Thiba River Watershed in Kenya [Master Thesis]. http://repository.pauwes-cop.net/handle/1/55Accepted:2018-08-09T10:45:07Z. Accessed Sept 2023.
Okello, C., Tomasello, B., Greggio, N., Wambiji, N., & Antonellini, M. (2015). Impact of Population Growth and Climate Change on the Freshwater Resources of Lamu Island, Kenya. Water, 7(3), 3. https://doi.org/10.3390/w7031264
Omay, P. O., Ogallo, L., Oludhe, C., & Gitau, W. (2016). Temporal and spatial characteristics of the june-august seasonal rainfall and temperature over South Sudan. Journal of Meteorology and Related Sciences. https://doi.org/10.20987/jmrs.5.08.2016
Opere, A. O., Waswa, R., & Mutua, F. M. (2022). Assessing the impacts of climate change on surface water resources using WEAP model in Narok county, Kenya. Frontiers in Water. https://doi.org/10.3389/frwa.2021.789340
Palmer, P. I., Wainwright, C. M., Dong, B., Maidment, R. I., Wheeler, K. G., Gedney, N., Hickman, J. E., Madani, N., Folwell, S. S., Abdo, G., Allan, R. P., Black, E. C. L., Feng, L., Gudoshava, M., Haines, K., Huntingford, C., Kilavi, M., Lunt, M. F., Shaaban, A., & Turner, A. G. (2023). Drivers and impacts of Eastern African rainfall variability. Nature Reviews Earth & Environment, 4(4), 4. https://doi.org/10.1038/s43017-023-00397-x
Park, K., Seong, Y., Jung, Y., Youn, I., & Choi, C. K. (2023). Development of water level prediction improvement method using multivariate time series data by GRU model. Water, 15(3), 3. https://doi.org/10.3390/w15030587
Rodrigues, J. A. M., Viola, M. R., Alvarenga, L. A., de Mello, C. R., Chou, S. C., de Oliveira, V. A., Uddameri, V., & Morais, M. A. V. (2020). Climate change impacts under representative concentration pathway scenarios on streamflow and droughts of basins in the Brazilian Cerrado biome. International Journal of Climatology, 40(5), 2511–2526. https://doi.org/10.1002/joc.6347
Rwigi, S. K. (2014). Analysis of potential impacts of climate change and deforestation on surface water yields from the Mau forest complex catchments in Kenya [PhD Thesis]. University of Nairobi.
Sahoo, S., Dhar, A., Debsarkar, A., Pradhan, B., & Alamri, A. M. (2020). Future water use planning by water evaluation and planning system model. Water Resources Management, 34(15), 4649–4664. https://doi.org/10.1007/s11269-020-02680-8
Sheffield, J., Wood, E. F., Pan, M., Beck, H., Coccia, G., Serrat-Capdevila, A., & Verbist, K. (2018). Satellite Remote Sensing for Water Resources Management: Potential for Supporting Sustainable Development in Data-Poor Regions. Water Resources Research, 54(12), 9724–9758. https://doi.org/10.1029/2017WR022437
Sieber, J. (2006). WEAP water evaluation and planning system. In: International Congress on Environmental Modelling and Software. https://scholarsarchive.byu.edu/iemssconference/2006/all/397. Accessed Sept 2023.
Tierney, J. E., Lewis, S. C., Cook, B. I., LeGrande, A. N., & Schmidt, G. A. (2011). Model, proxy and isotopic perspectives on the East African Humid Period. Earth and Planetary Science Letters, 307(1), 103–112. https://doi.org/10.1016/j.epsl.2011.04.038
USAID, & SWP. (2021). Water resources profile series. 1–10.
Vörösmarty, C. J., Green, P., Salisbury, J., & Lammers, R. B. (2000). Global water resources: Vulnerability from climate change and population growth. Science, 289(5477), 284–288. https://doi.org/10.1126/science.289.5477.284
Wada, Y., & Bierkens, M. F. (2014). Sustainability of global water use: Past reconstruction and future projections. Environmental Research Letters, 9(10), 104003.
Wamucii, C. N., Teuling, A. J., Ligtenberg, A., Gathenya, J. M., & van Oel, P. R. (2023). Human influence on water availability variations in the upper Ewaso Ng’iro river basin, Kenya. Journal of Hydrology: Regional Studies, 47, 101432. https://doi.org/10.1016/j.ejrh.2023.101432
Wang, J., Hu, L., Li, D., & Ren, M. (2020). Potential Impacts of Projected Climate Change under CMIP5 RCP Scenarios on Streamflow in the Wabash River Basin. Advances in Meteorology, 2020, e9698423. https://doi.org/10.1155/2020/9698423
Waswa, R. N. (2020). Assessment of the impacts of climate change on surface water resources in the Rift Valley Region: A case study of Narok County [PhD Thesis]. University of Nairobi. Assessment of the Impacts of Climate Change on Surface Water Resources in the Rift Valley Region: a Case Study of Narok County,
World Bank. (2018). World development report 2019: The changing nature of work. The World Bank. https://www.worldbank.org/en/publication/wdr2019. Accessed Sept 2023.
Wrua, U. T. (2010). Sub Catchment Management Plan_Upper Thiba.