41. In a hydrostatic example ( first figure ), where the hydraulic head is constant, there is no flow. 42. The plant's hydraulic head is. 43. The difference in elevation between the reservoirs affords an effective hydraulic head ( drop of the water ) of. 44. The drop in elevation between the upper and lower reservoir affords a hydraulic head ( water drop ) of. 45. The difference in elevation between the upper and lower reservoirs affords an effective hydraulic head of and maximum of. 46. The difference in elevation between the upper and lower reservoir affords a hydraulic head ( water drop ) of. 47. The difference in elevation between the dam and power station affords a hydraulic head ( water drop ) of. 48. The difference in elevation the water fall and weir provide will afford a hydraulic head ( water drop ) of. 49. The difference in elevation between the upper and lower reservoirs affords the power plant an minimum net hydraulic head of. 50. The intakes provide a maximum hydraulic head ( water pressure ) of as the water reaches a speed of about.
