A SCENARIO-BASED HYDROLOGICAL SIMULATION FRAMEWORK FOR CLIMATE-RESILIENT IRRIGATION WATER ALLOCATION IN TROPICAL WATERSHEDS
DOI:
https://doi.org/10.59003/nhj.v5i5.2033Keywords:
hydrological, irrigation allocation; rainfall variability, climate resilience, tropical watershedAbstract
Rainfall variability and climate uncertainty increasingly affect irrigation water availability in tropical watersheds. This study develops a scenario-based hydrological simulation framework for climate-resilient irrigation water allocation. The framework integrates rainfall scenario development, runoff estimation, evapotranspiration-based crop water requirement, water availability assessment, and monthly water balance analysis. Five rainfall scenarios were simulated, consisting of normal rainfall, moderate rainfall deficit, severe drought, extreme drought, and extreme rainfall conditions. The results show that reduced rainfall substantially decreases water availability and increases irrigation deficit during the dry season. Irrigation reliability declined from 75% under normal conditions to 60%, 42%, and 25% under moderate, severe, and extreme drought scenarios, respectively. In contrast, the extreme rainfall scenario increased reliability to 85%, although it may intensify runoff and flood risk. The proposed framework supports adaptive irrigation scheduling, crop calendar adjustment, storage optimization, and climate-resilient water allocation planning.
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AMPOFO, S., AMPADU, B., DOUTI, N. B., & KUSIBU, M. M. (2020). Modeling soil water balance of an agricultural watershed in the Guinea Savannah Agro-ecological Zone; a case of the Tono irrigation dam watershed. Ghana Journal of Science, Technology and Development, 7(1), 69–81. https://doi.org/10.47881/223.967x
Baral, K., Pandey, V. P., & Pradhan, A. M. S. (2024). Impact on Hydrological Alteration due to Climate Change in Seti Watershed. Journal of UTEC Engineering Management, 2(01), 25–35. https://doi.org/10.36344/utecem.2024.v02i01.003
Belay, Y. Y., Gouday, Y. A., & Alemnew, H. N. (2022). Comparison of HEC-HMS hydrologic model for estimation of runoff computation techniques as a design input: case of Middle Awash multi-purpose dam, Ethiopia. Applied Water Science, 12(10), 237. https://doi.org/10.1007/s13201-022-01764-7
Desta, H. S. (2024). Modelling land suitability and development potential options for irrigable and rainfed agricultural scenarios in Ethiopia. Irrigation and Drainage, 73(3), 1168–1191. https://doi.org/10.1002/ird.2929
Douville, H., Allan, R. P., Arias, P. A., Betts, R. A., Caretta, M. A., Cherchi, A., Mukherji, A., Raghavan, K., & Renwick, J. (2022). Water remains a blind spot in climate change policies. PLOS Water, 1(12), e0000058. https://doi.org/10.1371/journal.pwat.0000058
Enyew, F. B., & Wassie, S. B. (2024). Rainfall trends and spatiotemporal patterns of meteorological drought in Menna watershed, northwestern Ethiopia. Heliyon, 10(6). https://doi.org/10.1016/j.heliyon.2024.e27919
Jimoh, O. D., Otache, M. Y., Adesiji, A. R., Olaleye, R. S., & Agajo, J. (2023). Characterisation of Meteorological Drought in Northern Nigeria Using Comparative Rainfall-Based Drought Metrics. Journal of Water Resource and Protection, 15(02), 51–70. https://doi.org/10.4236/jwarp.2023.152004
Kavand, H., Ziaee, S., & Mardani Najafabadi, M. (2023). The impact of water conservation policies on the reallocation of agricultural water-land resources. Frontiers in Water, 5. https://doi.org/10.3389/frwa.2023.1138869
Meaza, H., Abera, W., & Nyssen, J. (2022). Impacts of catchment restoration on water availability and drought resilience in Ethiopia: A meta‐analysis. Land Degradation & Development, 33(4), 547–564. https://doi.org/10.1002/ldr.4125
Nolte, A., Eley, M., Schöniger, M., Gwapedza, D., Tanner, J., Mantel, S. K., & Scheihing, K. (2021). Hydrological modelling for assessing spatio‐temporal groundwater recharge variations in the water‐stressed Amathole Water Supply System, Eastern Cape, South Africa. Hydrological Processes, 35(6). https://doi.org/10.1002/hyp.14264
Raviraj, A., Ramachandran, J., Kaushal, N., & Mishra, A. (2021). Simple water balance model and crop water demand at different spatial and temporal scales in Periya Pallam catchment of upper Bhavani basin, Tamilnadu. Environment Conservation Journal, 22(3), 217–224. https://doi.org/10.36953/ECJ.2021.22326
Salehi Siavashani, N., Jimenez‐Martinez, J., Vaquero, G., Elorza, F. J., Sheffield, J., Candela, L., & Serrat‐Capdevila, A. (2021). Assessment of CHADFDM satellite‐based input dataset for the groundwater recharge estimation in arid and data scarce regions. Hydrological Processes, 35(6). https://doi.org/10.1002/hyp.14250
Wei, X., Garcia-Chevesich, P., Alejo, F., García, V., Martínez, G., Daneshvar, F., Bowling, L. C., Gonzáles, E., Krahenbuhl, R., & McCray, J. E. (2021). Hydrologic Analysis of an Intensively Irrigated Area in Southern Peru Using a Crop-Field Scale Framework. Water, 13(3), 318. https://doi.org/10.3390/w13030318
Wu, F., Bankston, J., Roehr, D., & Wei, F. (2021). Stormwater calculation application for low impact development in the conceptual design phase of urban site development. Journal of Living Architecture, 8(1). https://doi.org/10.46534/jliv.2021.08.01.041
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