Finding Potential Sites for Small-Scale Hydro Power in Uganda: a ...

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9.4 Algorithm SyntaxHEADHUNTERthe softwaremade by Christoffer Malmros & David BergströmMaster Thesis in Physical Geography March 2005This algorithm is developed to search through Rasterized Rivers, in order to find a heightdifference (head), of 20 meters over a distance of 100 meters. It is designed to search amaximum of ten connecting cells, which equals 100 meters. If the criteria of 20 meteraccumulated head is fulfilled, these cells will be saved into a output raster.Needed indata:a Matrix showing rivers where each river cell contain absolute elevation, extractedfrom an Digital Elevation Model.All values not containing elevation are set to zero.clear;%clears variablesclf;%clears figureclc;%clears command windowtime1= clock;time3=clock;Input of datafin=fop en ('rivers_elev.flt','r');%opens a file in read mode.data = fread(fin,[8254 5495],'float32');%reads th e data into a matrix with 4 byte real values.data = dat a';%flips t he matrix to right angle.fclose(fin);% closes th e input data file.[row,col] = size(data);%number of rows and columns are given as the variables "row" & "col".74
Frame creationThis is made in order to avoid pixel values along the edges.The algorithm must not calculate cells exceeding x-min/max or y-min/max.for a=1:1;%loop only the first rowfor b=1:col;%loop every columndata(1,b)=0;%set the cell values to zero, to create a border above the dataendendfor c=1:row;%loop every rowdata( c,1)=0;data( c,col)=0;%set the cell values of the first and last column to zero, to create%borders to the left and right of the data.endfor d= row:row;%loop only last row.for e=1:col;%loop every column.data(row,e)=0;%set the cell values to zero, to finalize the frame.endendCreation and definition of variables and matricescells = sum(data(:)>0);%counts the number of cells in "data" greater than zero.output=zeros(row,col);%creates a matrix to write the output into.rivercells=zeros(cells,3);%creates a matrix of 3 x "cells" and fills it with zeros.%It will soon contain all values and coordinates from "data".order=zeros(cells,3);% creates a matrix of 3 x "cells" and fills it with zeros.%It will soon contain ranked coordinates from "rivercells".%Highest elevation is ranked as number 1 in "order".rivercells_row=0;75
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Seminar series nr 121Finding Potent
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AbstractOver 2 billion people, most
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AcknowledgmentsFirst of all, we wou
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5 Result ..........................
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For the specific case of Uganda, a
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2 Study AreaThe main reason for us
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In the 1960’s Uganda was one of t
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2.1.3 TopographyMost of Uganda is s
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Figure 2.4 The highest volcano in K
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e able to manually write the data,
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Depending on the appearance of the
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o Then the water flows from the for
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and generator is 65% and 80% effici
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Table 3.2 Capacity and production o
Page 36 and 37: Table 3.5 Small-scale hydropower ca
Page 38 and 39: technology was supplied to an area
Page 40 and 41: component to all of these issues, g
Page 42 and 43: The Rural Electrification project t
Page 44 and 45: The closer the interviewer is to th
Page 46 and 47: Over this area we bought the follow
Page 48 and 49: The primary erosive force determini
Page 50 and 51: There are a set of tolerances used
Page 52 and 53: ivers are seasonal, since the hydro
Page 54 and 55: (a) (b) (c)Figure 4.8 An example sh
Page 56 and 57: 4.2.6 Post Processing of Output Dat
Page 58 and 59: A = ( b ⋅ h)2(4.3)Where A equals
Page 60 and 61: elinquish because of too expensive
Page 62 and 63: The first step when performing the
Page 64 and 65: more obvious in their geographic co
Page 66 and 67: By using a smaller area it is possi
Page 68 and 69: 5.3 Summary of Resultso The general
Page 70 and 71: projects are supposed to be finance
Page 72 and 73: Sinks are a reoccurring problem whe
Page 74 and 75: UTM Zone 36N projection. The study
Page 76 and 77: As described in chapter 3.3.3 all r
Page 78 and 79: and if good financing possibilities
Page 80 and 81: Hutchinson M. F., Dowling T. I., 19
Page 83 and 84: 9 Appendix9.1 Interview: Rural Elec
Page 85: 9.3 Digital DataAll data layers are
Page 89 and 90: time2=clock;%starts timer on clock
Page 91 and 92: next(1,2)=(y-1);cell_height=(highes
Page 93 and 94: endendif height>=20;%if the accumul
Page 95: Site 16 (147486,78619)Site 20 (1560
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