TBI Vietnam

Function of the forest in watershed and its relation with the river flow

Overall Objective:
Sustainable management of watershed forests and integrated management of upland watershed and low-lying coastal zone, based on environmental and economic concepts underpinned by quantitative knowledge of hydrological systems as connecting chain in the landscape.
Specific Objectives
  1. Improve knowledge on linkage between forests and seasonal water flows and floods;
  2. To model Perfume river run-off under present conditions of land use and forests, with remotely sensed evapo-transpiration (ET), at monthly time steps;
  3. To model and map the spatial extend of the Nov.'99 disastrous river flood (discharge and flood depth), with optimized precipitation (P) by remote sensing, at daily time steps, and asses impact on coastal plain and Hue city;
  4. To validate spatial extend of flood modeling results by remote sensing and ground truth;
  5. To assess risk of flooding in a stepwise approach using RS/GIS in equation: Rt=H*E*V;
  6. To train 2 ITC MSC students in hydrologic (flood) modeling of upland-lowland relations in humid tropical watershed and coastal zone;
  7. To build capacity among local researchers in applications of geo-information and earth observation to hydrologic (flood) modeling in Perfume river watershed and coastal zone;
  8. Amend policies in watershed areas.
Output:
  • One scientific report is based on a review of existing relevant research in watershed areas and a field survey (FSIV).
  • Two scientific reports (ITC): (i) the remote sensing approach and (ii) the (flood) modelling approach to linkages between forests and seasonal water flows in the Perfume river watershed. Reviewed scientific articles and a contribution to International Conference proceedings will be jointly prepared between FSIV and ITC staff, with potential foci on:
    - Amendment of forest planning and management policies in watershed areas
    - The spatio-temporal database of the Perfume river watershed and the hydrological RS approach;
    - Enhanced STREAM watershed model Perfume river for normal and flood conditions;
  • A crude risk and benefit analysis for downstream areas in relation with upland watershed forests.

Project Outline
In order to reduce floods and droughts watershed forests have been protected and established. Up to now studies on links between forests and water resources as well as watershed function services are limited and inadequate in term of information and data for clear understanding of roles of protection forests. Policies for watershed areas have to ensure livelihood of the local people and protect effectively watershed forests based on reasonable land use and benefits sharing.

This pilot study is aiming to study the link between watershed forests and water resources (droughts and floods) and watershed protection services (in upland and down stream). The proposed approach is a combination of: (i) international literature review; (ii) operational application of RS and GIS tools to watershed modelling; (iii) dynamic modelling of floods and droughts in a selected watershed in TTHue province, using the STREAM model code; and (iv) translation of results from literature review and modelling to policy development and planning.

The research results will provide a limited contribution to improvement and formulation of appropriate policies for sustainable management of watershed forests. By combining research and (externally funded) training activities, both in Vietnam and in the Netherlands, the project will contribute to local and international capacity building in this field. It also intends to prepare for a full fletched proposal with appropriate funding in the follow-up phase.

Partners

Forest Science Institute of Vietnam

International Institute for Geo-Information Science and Earth Observation

Contact: Dr Do Dinh Sam or Mr Vu Tan Phuong

Contact: Mr. Chris Mannaerts
Phone: +31 (53) 487 4210