DRAINAGE BOUNDARY DEFINITION

HYMOS COMPONENTS HYMOS IS A COLLECTION OF MANY INDIVIDUAL COMPONENTS NETTER HYMOS ODS Server Graph Server Database Database Server User Interface: Database- Manager

Codification in HYMOS

General Data Structure in HYMOS Databases ……… Stations ……… Data Catchment - b. Catchment - j Station a. Station x. Station y Station Particulars/History Time series data Current metering data Discharge rating data Sediment rating data Cross section data Relation oriented data

Equidistant time series data Station - j Type aa. Type ab. Type ba Time interval 1 Time interval 2 Time interval 3. Time interval j

Non-equidistant time series data Station - j Type pp. Type pq. Type qq

Directory Structure in HYMOS Hymos Programs & System Database Files DRIVE - XPATH...HYMOS4 ACCESS DATA BACKUP FIXED REPORTS SYSTEM UTILS DRIVE - y. DRIVE - z PATH...HYMOS DATABASESCAT1.DAT CAT2.DAT CAT3.DAT etc. SABARMATI.RAW DB MAPS PATH...XXX DIRECTORYBAS1.DAT BAS2.DAT BAS3.DAT etc.

Equidistant time series code Station - j Type aa. Type ab. Type ba Time interval 1 Time interval 2 Time interval 3. Time interval j Station Code + Data Type Code + Time Interval Code SERIES CODE

Non-equidistant time series code Station - j Type pp. Type pq. Type qq Station Code + Data Type Code SERIES CODE

Special time series codes Station - j Type AE (annual exceedances of fixed duration) Type AM (monthly maximum rainfall amounts) Station Code + Data Type Code SERIES CODE

Codification STATION –Unique set of 1 to 12 characters to identify a station –Also, the first part of time series code MEASUREMENT TYPE –Instantaneous –Accumulative –Constant

Time interval & time label UnitCode Calendar Time YEAR MONTH DAY HOUR MINUTE

Time interval Time interval unit + Divider Time interval Time interval unit : YEAR MONTH DAY HOUR Divider : Examples : Yearly data1, 1 Daily data3, 1 8 Hourly data3, 3

Exercise - t ime interval Time intervals –Seasonal –Monthly –Decade (10 days) –Weekly –15 minute –10 minute –Half daily –3 hourly

Answers –Time intervals Unit, Divider Seasonal (4 seasons)1,4 Monthly2,1 or 1,12 Decade (10 days)2,3* Weekly 1,52* 15 minute4,4 10 minute4,6 Half daily3,2 3 hourly3,8

Basic time interval Basic time interval unit + Multiplier Basic time interval Basic time interval unit : Month Day Hour Minute Multiplier : Examples : Decade2, 3 Weekly1, 52 Pentad2, 6 3,10 3, 7 ?? Data T.IB.T.I

Cyclic Series - Unequal intervals/ Non-standard timings Cyclic Series Unequal time intervals E.g., 3 observations a day at 0800, 1300, 1800 hrs. Examples : 0800, 1300, 1800 hrs. 3, 3 Daily at 0830 hrs. 3, 1 Twice Daily at 0830 & 1730 hrs.3, 2 Cyclic ?? Data T.IB.T.I Non-standard timings E.g., Day’s observations at 0830 hrs.

Time Label Year> Month Day1-28, 29, 30, 31 + Hour Subdivision index 1-99 = Position inside time unit –I–If any of the above is not in use, then it is = 0

Examples - time label 30 Jan 1989 Decade Feb. 76 July hrs, 1/2/ hrs, 1/2/ hrs, 7/1/ , 1, 30, 0, , 2, 0, , 7, 0, , 2, 1, 10, , 2, 1, 10, , 1, 7, 11, 4

Exercise - time interval & time label  T Basic  TTime label 4 seasons, 2nd season of 1991 June rd Decade August May April ,40,01991,0,0,0,2 2,10,01895,6,0,0,1 2,33,101956,8,0,0,3 2,63,51972,5,0,0,2 3,10,0 1947,4,21,0,1

Exercise - time interval & time label  T Basic  TTime label hrs. 31 Jan , 5 March hrs. 22 Apr th Week h 28/ h. 29/ ,60,0 1985,1,31,0,5 4,20,0 1967,3,5,18,2 4,600,0 1991,4,22,9,6 1,523,7 1980,0,0,0,14 4,40,0 1960,2,29,0,1