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APPENDIX A : TIIE DATA BASE<br />
the task ol nodel butldlng can often be slopl1fled lf the analyst ls<br />
relieved of th€ lesponribllity of il,ata nanageDent. Sclentlflc<br />
analysls of th€ data can then ploceed vithou! the need to organise lhe<br />
input data lnto the folD requiled for each partlcular process.<br />
Accoldlngly, a $oall data base was set up, and the data froo the<br />
catcluents unde! conslderatlon lrere Loaded into 1t Prlor to analysis.<br />
Data coul"d then b€ retrleved 1n a gtandald fo:at! by reference to a<br />
slngle llblaly subroutlne. In aalditlon, a alata base access package<br />
(DAPPE) uas lDpleD€nted, ithlch p€lfolDed all th€ routine functions,<br />
such as loading and f.isting the data, and genelal housekeePlng.<br />
1. TTIB DATA BASE<br />
llhe data base is used to hold the rainfall/runoff data, together ,ith<br />
lnfornation on catchDent chalacteli3tics, It consists of a set of<br />
randoD access flles, and uses a systen of rpolntersr for optlDurn<br />
effj.clency. fhere ale three types of record on the alata base, nadely<br />
calctrDent records, rainf,all and runoff recolcls, and Parameter recolals.<br />
Ihe catchnent recofds, which ate used as a dilectofy. are stored in<br />
ascendlng order of catchrnent number. and are accessed blt a blnary<br />
search algolithD, The contents of each tyPe of record ale as follovrs.<br />
L.! Catc"nent reco"d<br />
CalctEent nrDb€r l lnteger<br />
CatclEent nane -<br />
Tolal area of catchDent (o')<br />
-<br />
Paveal area lrlthin catchnent (r0')<br />
36 alphanulellc<br />
I reat vdlua<br />
I real valtre<br />
characters<br />
Nunb€r of events for catcturent I integer<br />
Tir0e intewal between guccessive I lnteger<br />
observations (seconds) (norDalIy 60 seconds)<br />
L.2 !@fu!!-gg_!WIf:e99!49<br />
(these have the same fom)<br />
Event nr,nber I inteqer<br />
start time (ln fofiD hh.m) I real value<br />
Dlte of event {In forn ddDDyy) I lnteger<br />
Duratlon of event (in Dinutes) I lnteger<br />
calchnent netness 4 a!.phanunerlc characters<br />
Nunber of values I lntege!<br />
Rainfatl/lunoff observatlons Up to 2oo real values<br />
I.3 Pa|arnetet tecotdg<br />
(a pa:.anete! record ls used to hold inforDation on segmenls lrlthln a<br />
partlcular catctuEnt, A oaxiBu! of LO segnents ale allowed).<br />
NuDber of, seg'nents I lnteger<br />
il