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A groundwater simulation model for well fields at the Agno River Basin : (Record no. 52256)

MARC details
000 -LEADER
fixed length control field	04694nam a2200421 4500
005 - DATE AND TIME OF LATEST TRANSACTION
control field	20260818132652.0
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field	180598 th eng
035 ## - SYSTEM CONTROL NUMBER
System control number	.b10030815
099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC)
Classification number	AIT Thesis no. WA-83-20
100 1# - MAIN ENTRY--PERSONAL NAME
Personal name	Gamboa, Renato Simon
245 12 - TITLE STATEMENT
Title	A groundwater simulation model for well fields at the Agno River Basin :
Remainder of title	Central Luzon, Philippines
260 ## - PUBLICATION, DISTRIBUTION, ETC.
Place of publication, distribution, etc.	Bangkok :
Name of publisher, distributor, etc.	Asian Institute of Technology,
Date of publication, distribution, etc.	1982
300 ## - PHYSICAL DESCRIPTION
Extent	ix, 121 p.
490 1# - SERIES STATEMENT
Series statement	Thesis ;
Volume/sequential designation	no. WA-83-20
500 ## - GENERAL NOTE
General note	A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Engineering and Technology
502 ## - DISSERTATION NOTE
Dissertation note	Thesis (M.Eng.) - Asian Institute of Technology, 1982
520 ## - SUMMARY, ETC.
Summary, etc.	The study was aimed at developing a computer model that will simulate the movement of groundwater at the Agno Groundwater Basin, Central Luzon, Philippines. The basin which is about 50 km by 54 km was modeled using a variable grid system. The finite difference equation developed for the model was solved by the modified interactive alternating direction implicit method using the Thomas Algorithm. The computer equivalent of the model was written in FORTRAN language and run in the IBM System/3031. Two grid systems were tried: 50 x 50 grid (800m x 2000m grid size) and 90 x 90 grid (400 m x 1000 m grid size) using two time increments: 30 days and 90 days. After testing for computer storage and time usage, and consistencies of computed results, the 50 x 50 grid system and 90 days time increment was used in the later part of the study. The aquifer type treated were two types: unconfined and confined. Further, the constant boundary treatments were al so two types. The first type is constant head throughout the simulation period, that is, the head is held at a constant value for the whole of the simulation period. The other is constant head at a time increment, that is, the head is held constant although out the iterations of a time step calculations. Calibration was done in two steps: blanket and selected adjustments of model parameters. For the comparison of computed results, available records on piezometric head observations and maps on piezometric head distribution were utilized. The model calibration resulted to a close duplication of the recorded responses on a general basis. The flow domain of the model was divided into four well field areas and each of which is considered as upstream or downstream well field according to its relative position in the general direction of the ground water flow. Using these arbitrary divisions of the modeled area, three different areal distribution of pumpings were developed for purposes of simulation. The three pumping schemes are: Scheme I - Uniform Pumping (all the wells in the well fields start pumping at the same time) , Scheme II - Upstream Start of Pumping (wells at the upstream well field start pumping first followed by the other well fields in the downstream direction) , and Scheme III - Downstream Start of Pumping (wells at the downstream well field start pumping first followed by the other well fields in the upstream direction) . Using the information on the crops to be planted, its water requirements and the cropping calendar for the modeled area, the groundwater withdrawals for each pumping scheme were determined and utilized to predict the responses of the aquifer.
650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element	Water, Underground
General subdivision	Simulation methods
650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element	Water, Underground
General subdivision	Philippines
--	Agno River Basin
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name	Gupta, Ashim Das,
Relator term	Chairperson
700 0# - ADDED ENTRY--PERSONAL NAME
Personal name	Tawatchai Tingsanchali,
Relator term	Examination Committee
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name	Christoph, Ing. Fried,
Relator term	Examination Committee
710 2# - ADDED ENTRY--CORPORATE NAME
Corporate name or jurisdiction name as entry element	US-ASEAN Development Cooperation Programme,
Relator term	Scholarship Donor
810 2# - SERIES ADDED ENTRY--CORPORATE NAME
Corporate name or jurisdiction name as entry element	Asian Institute of Technology.
Title of a work	Thesis ;
Volume/sequential designation	no. WA-83-20
856 ## - ELECTRONIC LOCATION AND ACCESS
Materials specified	Full-Text
Uniform Resource Identifier	<a href="http://203.159.5.9/ait-thesis/detail.php?q=B21420">http://203.159.5.9/ait-thesis/detail.php?q=B21420</a>
907 ## - LOCAL DATA ELEMENT G, LDG (RLIN)
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998 ## - LOCAL CONTROL INFORMATION (RLIN)
Operator's initials, OID (RLIN)	2
Cataloger's initials, CIN (RLIN)	951012
First date, FD (RLIN)	m
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945 ## - LOCAL PROCESSING INFORMATION (OCLC)
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945 ## - LOCAL PROCESSING INFORMATION (OCLC)
l	mnait
945 ## - LOCAL PROCESSING INFORMATION (OCLC)
l	mnarc
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type	20-AIT Publication
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type	40-Archives
909 ## - LOCAL ITEMS USED
Barcode	Barcode : 30050003050209
CREATED	CREATED : 1994-05-16
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909 ## - LOCAL ITEMS USED
Barcode	Barcode : 30050160035894
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Holdings
Not for loan	Home library	Current library	Shelving location	Date acquired	Cost, normal purchase price	Full call number	Barcode	Date last seen	Copy number	Price effective from	Koha item type
Available for Loans	Asian Institute of Technology Library	Asian Institute of Technology Library	AIT Publications	18/08/2026	10.00	AIT Thesis no. WA-83-20	30050003050209	18/08/2026	1	18/08/2026	20-AIT Publication
Available for Loans	Asian Institute of Technology Library	Asian Institute of Technology Library	AIT Publications	18/08/2026	10.00	AIT Thesis no. WA-83-20	30050003050191	18/08/2026	2	18/08/2026	20-AIT Publication
Available for Loans	Asian Institute of Technology Library	Asian Institute of Technology Library	Archives	18/08/2026		AIT Thesis no. WA-83-20	30050160035894	18/08/2026		18/08/2026	40-Archives

A groundwater simulation model for well fields at the Agno River Basin : (Record no. 52256)

AIT

Asian Institute of Technology Library