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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

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