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Irrigation Dictionary : Table of Contents (members login required)\t ________________________________________________ Search ICID-MTD Chapter All Chapters I GENERAL II HYDROLOGY III RIVER HYDRAULICS IV RECLAMATION V HEADWORKS VI - DESIGN OF IRRIGATION CANALS VII CANAL STRUCTURES VIII PROJECT WATER MANAGEMENT IX WELLS AND DRILLINGX PUMPING STATIONSXI IRRIGATION SYSTEMS AND DISTRIBUTION OF IRRIGATION WATERSXII ON-FARM WATER MANAGEMENTXIII DESIGN AND CONSTRUCTION OF DRAINAGE SYSTEMSXIV CONSTRUCTION MATERIALSXV CONSTRUCTION TECHNIQUES AND EQUIPMENTXVI AUTOMATION IN IRRIGATION, DRAINAGE AND FLOOD CONTROL SYSTEMSXVII OPERATION, MAINTENANCE AND MANAGEMENTXVIII SOIL AND WATER CONSERVATIONXIX ENVIRONMENTAL IMPACTSXX FLOOD CONTROLXXI COMPUTER TECHNOLOGY XXII SYSTEMS ANALYSISXXIII HYDRAULIC RESEARCHXXIV PROJECT PLANNING XXV- CLIMATE CHANGE beginning of word full word and in description Language ChineseEnglishFrenchHindiJapaneseRussian Show References (chapter/section)Yes No

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3082. Lacey`s equation : An empirical equation for alluvial channel. Equation propounded by Lacey for design of channels designs that relates regime velocity, slope and sediment characteristics as :         1   V = --- . R3/4 S1/2         Na wherein the absolute roughness coefficient Na = 0.0225f1/4 in which Lacey’s silt factor    f = 1.76d1/2, d being mean diameter of the sediment in mm, R is hydraulic mean radius (m), and S is slope.

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