Rainfall-Runoff Simulation in Part of Lower Niger Basin  

作　　者：Olusegun Adeaga Gil Mahe Claudine Dieulin Francoise Elbaz-poulichet Nathalie Rouche Jean-luc Seide Eric Servat 

机构地区：[1]Department of Geography, University of Lagos, Akoka-Yaba, Lagos 101017, Nigeria [2]Institute of Development and Research (Institut de recherche pour le developpement) (IRD), Rabat-Agda1896 7, Maroc [3]Hydro Sciences Laboratory, Montpellier 5, France

出　　处：《Journal of Environmental Science and Engineering(B)》2012年第6期812-819,共8页环境科学与工程（B）

摘　　要：Water resources assessment in poorly gauged and ungauged basins demand supportive rainfall-runoff estimation, while resolving practical water resource management and planning issues. In this study, the research method employed involves rainfall-runoff modeling and simulation with proper efficiency criteria evaluation using the MODMENS modeling platform, a numerical rainfall-runoff semi-distributed GR2M conceptual lumped model. The rainfall-runoff simulation was carried-out in three selected sub-basins of Lower River Niger Basin based on observable discharge dataset. Related error estimation was carried-out to estimate the runoff simulation uncertainty while model optimization approach entails use of Rosenbrock-Simplex method and model reliability evaluation entails the use of Nash and Sutcliffe efficiency criteria methods. Result shows a satisfactory model performance at Baro and Makurdi gauging stations （savannah ecological zone） while under-estimation characterizes simulated flow at Onitsha gauging station（Forest ecological region）. Seasonally, the model best fit the dry season flow but underestimate during the high flow periods （rainy seasons and wetter years）.

关 键 词：RAINFALL-RUNOFF SIMULATION GR2M River Niger 

分 类 号：P333.1[天文地球—水文科学] TV121.1[水利工程—水文学及水资源]