Application of an Electronic Analog Computer to the Problems of R

Utah State University DigitalCommons@USU Reports Utah Water Research Laboratory January 1967 Application of an Electronic Analog Computer to the Problems of River Basin Hydrology J Paul Riley Duane G Chadwick Follow this and additional works at: https://digitalcommons.usu.edu/water_rep Part of the Civil and Environmental Engineering Commons, and the Water Resource Management Commons Recommended Citation Riley, J Paul and Chadwick, Duane G., "Application of an Electronic Analog Computer to the Problems of River Basin Hydrology" (1967) Reports Paper 125 https://digitalcommons.usu.edu/water_rep/125 This Report is brought to you for free and open access by the Utah Water Research Laboratory at DigitalCommons@USU It has been accepted for inclusion in Reports by an authorized administrator of DigitalCommons@USU For more information, please contact digitalcommons@usu.edu APPLICATION OF AN ELECTRONIC ANALOG COMPUTER TO THE PROBLEMS OF RIVER BASIN HYDROLOGY by John Paul Riley Duane G Chadwick This report represents a section of the project completion report for a study which was s UppOl ted in part wah funds prov ided by the Department of the Interior Office of Water Resources Research under P L 88-379 Project Number.- B - all - Utah Agreement Number 14 0001 - - 53 Investigation period October 1966 to December 31 1967 The senior author of the report Dr John Paul Riley was a graduate research assistant supported partly by the above project The results of his work were utilized as partial fulfillment of the requirements for the Ph D degree Utah Water Research Laboratory College of Engineering Utah State University Logan Utah December 1967 ABSTRACT APPLICATION OF AN ELECTRONIC ANALOG COMPUTER TO THE PROBLEMS OF RIVER BASIN HYDROLOGY As demands upon available water supplies increase, there is an accompanying increase in the need to assess the downstream consequences resulting from changes at specific locations within a hydrologic system This problem was approached by electronic analog simulation of the hydrologic system The complexity of a hydrologic model depends to a large extent upon the magnitude of the time and spatial increments utilized in the model The increment size selected depends upon the types of problems to be solved Three models are described, and in each succeeding model the definition in terms of time and! or space is improved While the improved model is capable of solving the same heirarchy of hydrologic problems as its predecessor, it is also capable of solving many additional problems which require a higher degree of definition Preliminary verification studies for both the second and third models have shown close agreement between observed and com.puted discharge hydro graphs from prototype bas ins Riley, John Paul, and Chadwick, Duane G APPLICATION OF AN ELECTRONIC ANALOG COMPUTER TO THE PROBLEMS OF RIVER BASIN HYDROLOGY Research Project Technical Report to Office of Water Resources Research, Department of Interi.or, December 1967, Washington D C., 199 p I KEYWOR DS - -':'hydrologic models! ':'hydrolo gic s irn.ulation! ':'S imulation! ':'electronic analog computer! infiltration! runoff! in£all! pr ec ipitation! ':'watershed studies! ':'snowmelt! evapotranspiration! ':'hydrology! ': W til CD c: > c: - u c r • c r -~ :::!E - "0 ~ CD r -i ::::I D- E Area 1- \ u '~ I~ 1,= -1 JAN FEB Figure B6 MAR APR ~ : MAY ,-~ - -1 I- JUN JUl - AUG I SEP ' f' -" -==t I i · OCT NOV DEC Computed meah monthly evapotranspiration rates, Circle Valley, 1962 - 00 00 , "~ !' Cultivated C%) o (J) Area 10 ~ J: ~ s:: Q) c 0 > c: (i) C '0 ~ , /1 10 r j ~-I OutfloVl 80 sin from _., ~l (!) Basin ;:J o to ,~ -J ~ -I · ~·-·· -I··~··-::::::::·::::::::t::;.-:;~;:·,-;-:::;::~r-:: -··-··-··l- · -·-1 ' " '- ·1···· -1 · ·· ·/ - , -,1-,,, - , 1, JAN FEB MAR APR MJ "\Y J U tJ JUL AU G SEP OCT NOV DEC Figure B9 Computed values of inflow and outflow rates for the groundwater basin beneath the cultivated area of Circle Valley during 1962 -.0 t f'._ • '.~ ,~ 67 70 71 71 72 72 08 21 49 67 71 72 72 ~:G' 198 TIt, :: I '\ CR [ i\; c i'H ( t, I i'\ ":;, ? 15 30 -:'2 45 32 60 3.>2 75 32 ) = 1S • • 't J~ - ,~, Ii'~ eKE Iii E j" j ( TIVc 33 t~ 33 -2 :l J J -J - .I"~ 33 33 t" • 10 15 20 25 30 35 40 .33 33 45 33 50 33 55 33 60 33 65 33 TIIJ;[ P~CREME:NT (I'" IN)-;:: 10 • 10 33 20 33 30 33 40 33 50 33 60 33 70 33 Tff/it INC R Ei"i El~ T ( 1'1 r j'l ) -= 15 15 33 30 33 45 33 60 33 75 33 TTML PH: R E tlt f NT' i" IN) = L 38 10 38 15 38 20 3B 25 38 30 38 35 35 40 36 45 38 50 38 55 38 T I r·~ r- Ti\ eRE [" E;H ( rv: IN) = v,"' 10 38 20 38 30 313 40 38 50 38 60 :::;3 ~ " V Ii'! ) -= 3~ 21 02 0.00 03 04 06 05 09 • 12 • 15 10 04 (;2 01 01 01 14 49 70 72 72 03 07 ~13 17 26 38 53 63 67 68 69 70 71 07 10 07 21 38 63 68 70 25 06 02 e)! 17 71 13 13 20 38 67 70 71 29 /+ 01 I 0.00 cs il 11 16 21 0.00 05 16 27 43 64 78 14 05 04 03 03 87 90 92 0') 22 "),7 -~ , • 19 07 03 05 27 64 83 90 92 · ~83 "- - - _ _ _ -. 199 T; • , tI.' _C ~ c, :; (~, '?I ;-~ I ~ -,; C I~ t iJ, ~: ;-, T { f.' : ;\ } ') 30 l; := :~ C) 39 39 39 10 48 23 ? 15 20 2, ~() ;) • ~) ~ 60 3K J, I i~ ) :: i i\ C r< C :,1, E 1\ r ( i T:i i" C ~ 1:5 • , 30 35 40 39 39 "3';; 39 45 39 50 "'0 :) , 55 60 65 TlhE IN:: t{ !: !V: ENT UtI ;