Information and Knowledge Management Programme - Modelling Component - PowerPoint PPT Presentation

Information and Knowledge Management Programme - Modelling Component

1. Th e Council Study Hydrologic Assessment Discipline T eam led by t h e Information and Knowledge Management Programme (IKMP) is responsible for carrying out t h e h ydrologic, h ydraulic, sediment transport, and water quality modeling required to support t h e assessment of environmental and socio-economic impacts associated wit h water resources developments in six t h ematic areas or development sectors . 2. Th e Modeling T eam of IKMP will t h en translate t h ese descriptive scenario definitions into numeric model inputs ( Th e specifications for t h e different model scenarios will be defined by t h e Th ematic T eams of t h e Council Study):  Prepare and Update t h e Input data, Model  Setup and formulate different Scenarios  Provide t h e simulated results and assessment 3 . Th e modeling results will be reviewed, quality-c h ecked and interpreted by t h e Modeling T eam and documented in T ec h nical Reports .

Th e Lower Mekong Basin (LMB) is comprised of five different zones . E ac h of t h ese zones mig h t require a different set of models: Th e 1 D model for h ydraulic modeling of t h e upper reac h es of t h e Mekong mainstream and Lower Kratie; Th e 2 D (or 3D) modeling of t h e T onle Sap Great Lake is almost inevitable . The purpose is: 1. T o identify several feasible model configuration options t h at will meet t h e modeling requirements of t h e Council Study 2. T o support t h e decision makers in selecting w h ic h models/model combinations to employ for t h e Council Study

As request on t h e simulated result, apart from “standard” h ydrologic/ h ydraulic parameters suc h as runoff and water dept h , parameters on nutrients, sediments and water quality are considered as h ig h ly important for furt h er analysis in t h e Council Study . In particular, n utrie n ts and water quality (apart from salinity) and to some extent sedime n ts are not included into present day modeling routines at IKMP . IKMP utilizes t h e Mekong River Commission (MRC) Decision Support Framework (DSF) as standard modeling tool box . Th is tool box will be used as t h e primary basis for t h e modeling work for t h e Council Study, in particular t h e use of t h e approved DSF models suc h as SWA T , IQQM, and iSIS .

D ue to its curre n t modeli ng limitatio n s, other models will be ide n tified a n d evaluated to address these limitatio n s a n d au g me n t the curre n t modeli ng fu n ctio n alities of the DSF models to support the Cou n cil S tudy Th e Possible choice will be described using: 1. Several selection criteria (Model Capacity, Model available and existing input data using for eac h Model) and 2. T ime of implementation 3 . Including required cost and

MO DEL IN TR O DU CT I O N

D ata A n alysis Tool DSF ArcGIS Model DSF IA T & Reporti ng A dditio n al Tool Tools SWA T SWA T Models IQQM IQQM T oolbox Software D ata M a n a g eme n t Tool Process Models Models KB Q uery Tool ISIS ISIS GIS Base Models KB IWRM IWRM 12 3D Models QA Tool Future D ata Tra n sfer Tool Future Software Models Software Model M RC Manager Manager M aster Catalo g ue

Support BDP wit h Simulation of n n D evelopme n t basin-wide development sce n arios planning tools scenarios Analysis of c h anges Support “Rules n n D ecisio n in water conditions Formulation” in S upport I mpact Pla nn i ng analytical tools F ramework assessme n t data Support ot h er n Platform for impact n sector programs assessment wit h h ydro- meteorologic Pla nn i ng decisio n s information o n “ Rules” & B D P Stores acquired n knowledge

Capacity of DSF Package to providing result for Hydrological and Sediment Assessment Model Capacity Model Output: Daily discharge, water level from 1985 -2008 Zone 1, 2, 3 Flow/WL Sediment Water quality *Monthly sediment from 1985 -2008 (Calibration Needed) SWAT/IQQM √ √* - Modelling Gap: lack 2D, 3D Sediment Modelling Mainstream Mekong 1D - iSIS (Upper Kratie) √ √* - lack Water Quality Modelling Model Capacity Model Output Daily discharge, water level from 1985 -2008 Zone 4a, 4b Flow/WL Sediment Water quality Inundated area of Floodplain in the Tonle Sap Tonle Sap River and SWAT/IQQM √ - - Modelling Gap: lack 2D, 3D Sediment Modelling Great Lake 1D - iSIS (Lower Kratie) √ - - lack Water Quality Modelling Model Capacity Model Output Daily discharge, water level from 1985 -2008 Zone 5 Flow/WL Sediment Water quality Salinity Inundated area of Floodplain in the Mekong Delta The Cambodia and IQQM - - - - Salinity Impact in the Mekong Delta Vietnamese Delta 1D - iSIS (Lower Kratie) √ - - √ Modelling Gap: lack 2D, 3D Sediment Modelling lack Water Quality Modelling Remark : √* = M odel Calibration Need - Define as Modelling Gap Legend:  Available  * Available, but recalibration is required Grey shaded cells mark model gaps

Model Scope Model Capability Great Lake (Tonle Sap) Mekong Mainstream Model Mekong Delta Water Quality Model Area Tributaries Sediment Flow MRC Decison Support Framework package UMB, LMB from China Border - SWAT Hydrologic Model x x x NA x *x NA Kratie, Great Lake (Tonle Sap) UMB, LMB from China Border - IQQM Water Balance Model x x x x x NA NA Kratie, Great Lake (Tonle Sap), Mekong Delta Mekong Mainstream from Chiang Saen - Kratie, Hydrodynamic Model ISIS x NA x x x NA NA Cambodia Flood Plain - Mekong Delta WUP-FIN model package UMB, LMB from China Border - Legend: x Available Hydrologic model VMOD Kratie, Great Lake (Tonle x x x x x NA NA *x Available, but recalibration is required Sap),Mekong Delta NA Not available (shaded in grey) UMB, LMB from China Border - Water Balance Model IWRM x x x x x *x NA Kratie, Great Lake (Tonle Sap), Mekong Delta EIA 3D Great Lake (Tonle Sap), Hydrodynamic Model NA NA x x x *x *x Model Mekong Delta

The mai n issues of the DSF withi n the co n text of the Cou n cil S tudy modeli ng requireme n ts are as follows: 1. Th e current DSF models h ave not been applied to simulate sediment and water quality fate and transport including nutrients due to t h e limited on time and quality of sediment and water quality data is still suspect and need furt h er investigation . 2. Despite complex flow conditions in floodplains and reservoirs including t h e T onle Sap -Great Lake, t h ey can only be simulated in iSIS using one-dimensional h ydrodynamic flow model . 3 . 1 D-ISIS models for t h e Mekong Mainstream (from C h iang Saen – Kratie is still under t h e process of testing by Modelling T eam and waiting for approval for official use by t h e T ec h nical Assistance and Coordination T eam)

Th e IWRM modeling system consists of t h e following two components: 1. V MOD (IWRM/HA E ) distributed h ydrological model wit h compre h ensive water management, farming system, erosion, h ydropower and climate c h ange sub- components; simple flooding is included for crop impact modeling . 2. Combined 1 D/ 2 D h ydrodynamic model for flooding, erosion, water quality, primary productivity and fis h eries productivity .

Legend: x Available *x Available, but recalibration is required NA Not available (shaded in grey)

The mai n issues of the W U P- FIN models i n the co n text of the Cou n cil S tudy modeli ng requireme n ts are the followi ng : 1. Th e WUP-FIN models need recalibration as t h ey h ave not been updated wit h t h e most recent available data . 2. Th e WUP-FIN models do not cover t h e entire LMB .

Th e Mike-DHI modeling system consists of t h e following two components: 1. Mike Hydro: distributed h ydrological model wit h compre h ensive water management, farming system, h ydropower and climate c h ange sub-components; simple flooding is included for crop impact modeling . 2. Combined 1 D/ 2 D h ydrodynamic model for flooding, erosion, water quality, primary productivity and fis h eries productivity .

M odel S cope M odel Capacity MK mainstream Mekong Delta Water Quality T ributaries Great Lake M odel N ame Sediment Model Area Flow H ydolo g ic + Water bala n ce M odel Mike Basin UMB, LMB from C h ina Border - Kratie, x x x x x x x Great Lake H ydrody n amic M odel: Mike 11 UMB, LMB from C h ina Border - Kratie, x x x x x x x Great Lake NA NA Mike 21 ( 2 D) MK mainstream from C h iengSaen - x x x x x Kratie, Great Lake Remark: NA = Not available

The mai n issues of the D H I modelli ng packa g e i n the co n text of the Cou n cil S tudy modelli ng requireme n ts are the followi ng : 1. Th e DHI modelling package h as not been officially approved by MRC for t h e Lower Mekong Basin . 2. A license of t h e DHI modelling package would h ave to be purc h ased by MRC before it can be used for t h e Council Study . 3 . Th e Modeling T eam at IKMP will need furt h er training on t h e DHI Modelling Package and/or DHI personnel or ot h er external consultants will h ave to be employed to primarily conduct t h e modelling for t h e Council Study .

P O SSI B LE C H O I C E