Show MEANS OF MEASURING WATER A method metho of at measuring water willer easily available by farm farmers ers for tor practical use lise Is III given by lJ Di 1 Director rector S Fortier In Bulletin 31 of ot the Montana experiment station Among other things Prof Irot Portier ss ssI For I or occasional measurements the tho earthen channel of a n ditch or canal an anSwer all 1111 purpose but when Ihen more ac ar accurate curate and continuous measurements are fO desired tIl rating Humes lire are usually constructed These consist of ot wooden woollen lumos ns wide as the water Iter channel and tram from eight to 24 I feet In length I to conform with the grade of f the canal The velocity of the Is found by a n current meter and the tho depth of water Is often otten record recorded ed on a sheet attached to a 11 machine which needs attention only every seventh day dayA dB A weir box usually U consists cons Isis of a flume with the lower end In Inthe he the middle of the t top P of the lower end enda a n notch Is rut cut through which the wa 11 tl cr r to be mea Hows IR Weirs re require require quire no Instruments other than a Il toot foot rule ule They Tho are easily and cheaply nado mado and measure lowing water within Z per ler cent of accuracy when all he the te conditions are fulfilled Weir boxes boxell as IS compared compo rod with miners boxes more accurate II erum t can be lit milt buill for tr the ame me It If not for tor less money nd ran un be used uRd to measure much lar larer larger ger er volumes The chief defects of this are that the box ofton fills with sediment which must b be removed and ond that hat the water as It issues from the notch requires a 1 drop of ot at 11 t dou tIou douile bit ile the depth of water through the he notch For nearly half bill a II century western have ha tried trl to a n way 1 W y which water ater might be b measured as all ast It t flown through a n They hoped to o make one structure answer two pur Jur In this they have he tailed failed for tor the Ih n non that water Is III HO much agitated and no o I III I In III low How a II It passes n II as to tender It Im In to an accurate meas measurement Of Ot ate years measuring bt r n M havo hlo betm heun placed at tha tho mo most t mutable points below belu the the tho latter hitter control the str while thi th former Indicates th volume Tills This rule rull applies s to weirs It U III well ell to have havea a Il of at ot least 60 0 feet between tho two structures and 1111 If a II better site lito cnn can bo he secured farther down tho ditch tho Intervening distance may be Jl Increased InC od to several hundred feet Prof Irot pamphlet contains working dra for tor four Intended In It Ihl to be Je placed near tho heal head of ot farmers laterals that divert water from natural or canals alEo a weir box for tor the head henl of ot n a large lateral In that will measure wa Wll water ter to supply the needs of from trum live to I 15 farmers Carmer This hl publication Is I the first of or n a of oC farmers bulletins on Irrigation topics |