Comprehensive Basin-wide System for Impact Assessment

MRC Modeling Toolbox and Supplementary Models: Estimate Changes in Flow, Sediment, and Water Quality

New Ecosystem Model: Estimate Changes in Ecosystem

Improved Socio-Economic Methodology: Estimate Social and Economic Impacts

C a m b o d i a • L a o P D R • T h a i l a n d • V i e t N a m

For sustainable developmentwww.mrcmekong.org

http://www.mrcmekong.org/highlights/the-study-on-sustainable-management-and-development-of-the-mekong-river-including-impacts-of-mainstream-hydropower-projects/

Study on the Sustainable Management and Development of the Mekong River Including Impacts of Mainstream Hydropower Projects(Council Study)

Figure 2-3. List of models used for the Council Study in different zones.

ZONE 4 DSF: SWAT/IQQM/ISIS WUP-FIN: Tonle Sap 3D-EIA (+ VMOD)

ZONE 5 DSF: ISIS WUP-FIN: VMOD Impact

ZONE 1 - 3 DSF: SWAT/IQQM/ISIS eWater Source

0

1000

2000

3000

4000

5000

6000

7000

8000

1-Jan 1-Feb 1-Mar 1-Apr 1-May 1-Jun 1-Jul 1-Aug 1-Sep 1-Oct 1-Nov 1-Dec

Comparing Daily flow at ChiangSaen between with and without Chinese Dam

Observed (1960 - 1992 - Before Dam) 1995 add MW 2003 add MW&DSH 2008 add MW&DSH&JH 2010 add MW&DSH&JH&XW 2014 add MW&DSH&JH&XW&NSD

(3 Dams) After Manwan + Dachaoshan + Jinghong

(1 Dam) After Manwan

Obsered Before Dam

Discharge

-cms

(4 Dams) After Manwan+Dachaoshan + Jinghong+ Xiaowan

(5 Dams) After Manwan+Dachaoshan + Jinghong+ Xiaowan+Nhuzhadu

Supplement to Baseline Selection for the Council Study Compare 2000/2007 Page 1

Figure Error! No text of specified style in document.-1 The annual number of discharge reversals at Chiang Saen, Luang Prabang and Vientiane, 1960 – 2010.

2003: Dachaoshan Commissioned

1993: Manwan Commissioned

Developing Response CurvesDry onset(Hydrology)

Dry duration(Hydrology)

Dry 5‐day min QRithron species

Dry 5‐day min Q(Hydrology)

Ave Dissolved oxygen(Water quality)( q y)

Bed sediment size(Geomorphology)

Biomass benthic invertebrates(Macroinverts)

Overview of social assessment methodology

011

% of HHs with access to safe water

Strategic Indicator

Assessment indicator Assessment criteria Discipline specific indicator 

SIMVA

 20

Water security% of HHs with access to safe water 

% of HHs reporting water shortages

HHs income, etc

o‐econ

 Dba

se

Livelihoods and well‐being

Food security

Income security

HHs with access to sanitation and health facilities

Dependency ratio, gender ratio

Household expenditure poverty

SocioIncome security

Health security

Household expenditure, poverty rate, etc 

Irrigated and rainfed rice d i

AIP

Health security production

Aquaculture production

Paddy field fish, OAA, etc

BioR

A

Employment

Employment Production of catch fish 

Production of riverbank gardens 

Reservoir fisheries

Flooded area, etc

Gender equity

,

Econ Paid and unpaid employment