| Show ABOUT LIR i to is indebted bi to professor sair samuel fortier who occupies the ehalt of bivil and hydraulic engineering at tile the utah agricultural college at logan lagan for a COW copy of the following document which will doubtless be read fed with much satisfaction by farmers and others who take an interest it in the subject abject of irrigation OGDIN OGDEN utah aug 2nd and 1893 the president tind and board of directors utah sod salt bait like lake canal co gentlemen while collecting to in formation ou on irrigation devel ament ment in salt lake county in the interest Inte reata 8 ot the agricultural 0 ollege college of utah I 1 made a series of messu rem ants of the waters taken through the weirs of tile the utah and salt lake canal the results of which will beana be anxiously bously expected by the hundreds of farmers taking water my main object was to determine the be low joss by seepage and evaporation but 1 I have been e cabled incidentally liioi dentally to cheek the flow through e sch each weir and thus has to determine the accuracy of lae ane distribution at the time the present system ol of weirs was put to in which ich was some six years ago J D H mcallister C E ascertained the 10 9 in transmission wet tot the 28 milte of canal to be over 50 to the cheslow slow however percent per cent owing rate ftfe which the water flows flow and the large percentage of sediment the bottom 81 alhage have aluce and sides of the ca become much more impervious there ie still considerable seepage I 1 the upper three miles and also some in the porous mater materials laJ Is near the lower ind cod but the large middle portion to is in fairly good condition I 1 measured the canal at its if head gate in jordan narrows july 1893 and faund 1 a total flow of cubic icet I 1 at per seco second nd and iu in sho fell week following traversed the entire jenitta of the canal making no less the than 46 measurements the aum tot 1 of tithe the weir measurements amount to cubic feet per second which indicates indicate a low iota of 84 2 10 cubic feet feer or about AV 19 per cent st of the entire low flow lethe work was being done rain foll fell inace vicinity of the upper portion ponton of the 06 canal and this rain way may have possibly maced the loss lose 6 5 per cent but not it is fg sale aai to assert there ore lore that the entire loss during tile the months ot of rt find and august to Is from 20 to 26 per of f the water diverted from me jordan at the he dam in the narrows 22 in II regard to so tile the ul vision of water she results are not satisfactory the idea that shut water can be run over weirs of equal widths and vary the depth in direct proportion to the amount of water required is all wrong in principle asas as the following table shows for a 8 weir 20 inches wi wide je OP ON IV IN INCHES 11 1 21 2 j 3 8 41 4 51 5 61 6 71 7 8 9 11 10 11 12 IN CUBIC FEET PER SECOND aa or t 07 lb IL 62 C 89 by the present arrangement the division of water is entirely guesswork and that there are not more serl ow one won errors is due to the good judgment and experience of your present pre fleat super in B R B gardner the following are the results of the measurements with the number of shares and th the amount of water which should flow through each weir according to the number of shares owned for example in weir no 15 the actual flow as ag measured is ie 84 3 cubic feet per second whereas its ita pro rats rata share is only 2 10 cubic afeei feel io in weir no 16 the actual flow to is 1 3 10 cubic feet whereas it should be 2 19 cubic feet q 6 OB t M p B B tt a s g t 4 s ss 2 MO p S fe 1 W Z 1 ZI Z r ioe 5 10 4 9 oo a CB en 01 to M as 19 E g 50 seg N S 5 8 g 5 co S i ciot aco W 4 3 1 M S 0 t 01 att 0 10 Z W C SS 5 4 55 15 0 ase 0 S 0 0 F M 5 M t 1 to 10 0 h t PO all P ta PC to P I 1 P tb p 1 SS ass CO 0 CO 4 M 09 soo Z 0 oo 00 5 B g S c 1 2 p Q X P 7 fa M 1 12 1 1 L S t vi K 83 ai S ai cr kia i efte a 3 SA P agi 4 P P t i Q 01 the withdrawal of water from the canal in a vertical section by means of gates gate moving horizontally seems to be a move iti in the right direction but it la in to be regretted that the weirs are not so ao constructed as aa to measure the water accurately giving iso to the writers calculations a continuous flow of about 1 cubic feet per second to every 65 shares in view of thi th 3 immense value of the jordan river to salt bait lake county it is surprising that no accurate or continuous gaug ings have been maile made A caretaker has lived in the narrows for years and it if a gauging station was once established immediately above the dam there would be no extra cost in keeping the record inasmuch as there are five canals taking water from the jordan and that each lei Is entitled to a sixth of the how flow of the river there should also berating be rating flumes blumes near des r the head gates canal so toafa the 0 care are aker knowing the amount in the river could readily and accurately give to each canal its allotted portion I 1 atu am respectfully 8 fortier department of civil and hydraulic engineering agricultural college of utah |
