手法を比較

	Muskingum法	MODFLOW groundwater modeling	Unit Hydrograph
分野	土木工学	土木工学	土木工学
系統	Process / pipeline	Process / pipeline	Process / pipeline
提唱年	1938	1984 (original release); continuously updated through MODFLOW-6 (2017)	1932
提唱者	George McCarthy	Michael G. McDonald and Arlen W. Harbaugh (U.S. Geological Survey)	L. K. Sherman
種類	Hydrologic method for flood attenuation in rivers	Numerical groundwater flow simulation	Linear transformation from rainfall to streamflow
原典	McCarthy, G. T. (1938). The Unit Hydrograph and Flood Routing. US Army Corps of Engineers Document 608.	Harbaugh, A. W. (2005). MODFLOW-2005, the U.S. Geological Survey modular ground-water model — the Ground-Water Flow Process. U.S. Geological Survey Techniques and Methods 6-A16.	Sherman, L. K. (1932). Streamflow from rainfall by the unit graph method. Engineering News-Record, 108(14), 501-505.
別名	Flood routing, Stream flow attenuation, Hydrologic routing	MODFLOW-2005, MODFLOW-6, modular groundwater flow model, USGS groundwater model	UH, Rainfall-runoff, Hydrograph synthesis
関連	3	0	3
概要	The Muskingum method is a hydrologic flood routing technique that predicts how a flood wave attenuates (reduces in peak) and spreads as it travels down a river reach. Developed by McCarthy in 1938 for the US Army Corps of Engineers, the method is simple enough for hand calculations while capturing the essential physics of flood propagation.	MODFLOW is the U.S. Geological Survey's open-source, modular finite-difference model for simulating three-dimensional groundwater flow through porous media. First released in 1984 and continuously updated — most recently as MODFLOW-6 — it is the global standard for quantitative hydrogeological analysis, widely used in civil engineering, environmental consulting, water-resource management, and groundwater contamination studies.	The unit hydrograph (UH) is a linear transformation that converts rainfall excess into streamflow for a watershed. Introduced by Sherman in 1932, the UH assumes that rainfall-runoff response is linear and time-invariant, enabling synthesis of flood hydrographs from design storms for dam spillway design and flood risk assessment.