Table 2

1 January 2000

Table 2: Selected impulse unit speed drop characteristicsN = normal waterhammer, I = instantaneous waterhammer.New regulation rank based on speed drop, old from Table 1.

Unit	Penstock length (m)	Max sound wave a m/s	J ratio	Waterham ratio	10% Jet time, Te	Speed Drop %	Regulation rank
		New	Old
Achachicala	1,532	1,352	2.50	0.134 I	0.90	2.83	5	6
Angostura	1,070	1,252	1.30	0.193 I	0.90	4.91	8	7
Botijlaca	406	1,216	1.14	0.141 N	1.20	6.48	9	9
Cat Arm	2,900	1,100	1.54	0.067 I	0.90	0.99	1	1
Corani	1,158	1,052	1.15	0.080 I	0.80	1.91	3	3
Cuticucho	1,207	1,270	1.08	0.098 I	0.60	2.53	4	4
Miguilla	1,323	1,243	2.54	0.130 I	0.73	1.76	2	2
Santa Rosa #1	330	1,070	1.07	0.225 I	0.60	4.60	7	5
Santa Rosa #2	1,274	1,224	1.05	0.060 I	1.40	3.73	6	8
Zongo #1	1,117	1,292	2.79	0.249 N	2.10	9.74	10	10

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