# Hyporheic Exchange Model: Mouse drop

Model was written in NetLogo 6.2.0
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breed [ particles particle ] particles-own [ residence-time in-bank? ] globals [Boundary constant k2 height time-counter time-dx HydrCond2 hm2 Boundary2 xcutoff U2 depth2] to-report surface-function [ x ] report height * sin ( k2 * x ) + Slope * x end to setup clear-all set-default-shape particles "circle" set constant 270 / lambda set Boundary BedDepth set k2 ( 360 / (constant * lambda )) set height ( BedformHeight * constant ) / 2 set time-counter 0 set time-dx 100 set HydrCond2 constant * HydrCond set U2 ChannelVelocity * constant set depth2 depth * constant ifelse (( height * 2 / depth2 ) > .34) [set hm2 .28 * ( ( U2 ) ^ 2 ) / ( 2 * 9.8 * constant * 100 ) * (( height * 2 / depth2 ) / .34 ) ^ ( 3 / 2 ) ] [set hm2 .28 * ( ( U2 ) ^ 2 ) / ( 2 * 9.8 * constant * 100 ) * (( height * 2 / depth2 ) / .34 ) ^ ( 3 / 8 ) ] set Boundary2 constant * Boundary set xcutoff constant * lambda * floor( 270 / (constant * lambda)) ask patches [ ifelse ( pycor < surface-function (pxcor)) [ set pcolor brown + 2 ] ; sand color [ set pcolor blue - 2 ] ; water color if ( pycor < -1 * boundary2 ) [ set pcolor black ] if ( pxcor > xcutoff ) [ set pcolor black ] if ( pxcor < 0 ) [ set pcolor black ] ] reset-ticks end to go ask particles with [ in-bank? ] [ move ] ifelse (time-counter = 0 and time1 > 0) [ change-color 65 ] [ ifelse (time-counter < time1 * 60 and time-counter + time-dx >= time1 * 60) [ change-color 75 ] [ifelse (time-counter < time2 * 60 and time-counter + time-dx >= time2 * 60) [ change-color 83 ] [ifelse (time-counter < time3 * 60 and time-counter + time-dx >= time3 * 60) [ change-color 125 ] [ifelse (time-counter < time4 * 60 and time-counter + time-dx >= time4 * 60) [ change-color 115 ] [ifelse (time-counter < time5 * 60 and time-counter + time-dx >= time5 * 60) [ change-color 105 ] [ if (time-counter < time6 * 60 and time-counter + time-dx >= time6 * 60) [ change-color 95 ] ]]]]]] set time-counter time-counter + time-dx tick end to timestep ifelse (time-counter < time1 * 60 ) [ repeat ((time1 * 60 - time-counter) / time-dx) [go] ] [ifelse (time-counter < time2 * 60 ) [ repeat ((time2 * 60 - time-counter) / time-dx) [go] ] [ifelse (time-counter < time3 * 60 ) [ repeat ((time3 * 60 - time-counter) / time-dx) [go] ] [ifelse (time-counter < time4 * 60 ) [ repeat ((time4 * 60 - time-counter) / time-dx) [go] ] [ifelse (time-counter < time5 * 60 ) [ repeat ((time5 * 60 - time-counter) / time-dx) [go] ] [ if (time-counter < time6 * 60 ) [ repeat ((time6 * 60 - time-counter) / time-dx) [go] ] ]]]]] end to change-color [newcolor] ask particles with [in-bank?] [ set color newcolor stamp ] end to move let ycor2 ycor - surface-function( xcor ) let exp1 exp ( k2 * (2 * pi / 360 ) * ycor2 ) let exp2 exp ( k2 * (2 * pi / 360 ) * (-2 * boundary2 - ycor2 ) ) let exp3 exp ( k2 * (2 * pi / 360 ) * (-2 * boundary2) ) let expsum exp1 + exp2 let yvel ((-1 * (cos ( xcor * k2 )) * ( ( exp1 - exp2) * (k2 * 2 * pi / 360 )) * hm2)) / (1 + exp3) * HydrCond2 / porosity ; let xvel ((k2 * (2 * pi / 360 ) * ( sin ( xcor * k2 )) * ( expsum ) * hm2 ) ) / (1 + exp3) * HydrCond2 / porosity; set xcor xcor + time-dx * (xvel - HydrCond2 * Slope / (porosity * (1 + Slope ^ 2))) ; / constant if (ycor + yvel > max-pycor) [ show "big problem -- particle lost above screen" die ] if (ycor + yvel < min-pycor) [ ;show "Oh no, I'm lost!" die ] set ycor ycor + time-dx * (yvel - (HydrCond2 * Slope ^ 2) / (porosity * (1 + Slope ^ 2))); + HydrCond2 / porosity );/ constant set residence-time residence-time + time-dx if xcor >= xcutoff [ pen-up set ycor ycor - Slope * xcutoff set xcor xcor - xcutoff if show-paths? [pen-down] ] if xcor <= 0 [ pen-up set ycor ycor + Slope * xcutoff set xcor xcor + xcutoff if show-paths? [pen-down] ] set in-bank? (ycor <= surface-function xcor) if not (in-bank?) [ ; we want them to stamp them right on the function, for better visuals set ycor surface-function xcor ht ] end to mouse-drop if mouse-down? [ ask patch mouse-xcor mouse-ycor [ sprout-particles 1 [ set xcor mouse-xcor set ycor mouse-ycor if any? other particles in-radius 0.24 ; don't let them drop particles too close to each other [ die ] if (ycor > surface-function xcor) ; don't let them drop particles above the surface [ die ] set in-bank? true set residence-time 0 set size 2 set color 65 if (show-paths?) [ pd ] ] ] ] end ;; COMMENTED OUT 10/15/2021 to allow running in NetLogoWeb ;to export-residence-times ; let file user-new-file ; if ( file != false ) ; [ ; if ( file-exists? file ) ; [ file-delete file ] ; file-open file ; ] ; let res-time-list [ residence-time ] of particles with [ not in-bank? ] ; foreach res-time-list ; [ ?1 -> ; file-type ?1 ; file-type "\r\n" ; ] ; file-close ; ;end

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## Attached files

File | Type | Description | Last updated | |
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Hyporheic Exchange Model: Mouse drop.png | preview | Preview for 'Hyporheic Exchange Model: Mouse drop' | almost 9 years ago, by Susa Stonedahl | Download |

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