Nyein Thandar Ko

Nyein Thandar Ko

Nyein Thandar Ko, Netherlands

I am nationality of Myanmar. I was working as a lecturer at the Yangon Technological University in Myanmar. Now, I am studying as a Ph.D student at Water Management Department in Delft University of Technology, The Netherlands. I am working about “Monitoring of River Health of Ayeyarwady River in Myanmar” as my Ph.D thesis. In that case, I am working about biomonitoring of water quality as an bioindicator for impact assessment.

Presentation Title: Changes in macroinvertebrates assemblages in regulated rivers in Myanmar: Macroinvertebrate as an indicator to study the potential impact of dams.

Rivers in Myanmar provide a range of essential services to people including transportation, domestic and industrial water supply, agriculture, hydropower, fisheries, and a myriad of other ecosystem services. A controversial issue globally and currently in Myanmar are the construction of new dams, to improve economic and social benefits. Unfortunately, in the past water resources development satisfied human demands but often ignored the criterion of ecosystem integrity. The Ayeyarwady river basin is the largest river basin in Myanmar, with many tributary dams for hydropower and agriculture purposes already existing and many more proposed. This research concentrates on the possible impact of dams on macroinvertebrate communities in Upper Ayeyarwady river basin in Myanmar, and discusses if changes in the macroinvertebrate assemblages could be related to river regulation, and what potential impacts new dams could have on the ecosystem. The selected sampling sites are two upstream sites and two downstream sites for each of the two study dams. Five kick or sweep samples at different locations were collected at each site. A single sample was used in the field to define the ecological condition of rivers based on the sensitively scores of three different standardized community-based assessment methods. MiniSASS, The Australian Waterwatch Method and The Asia Foundation were all used. Preliminary field results based on these methods indicate a change from the upstream to the downstream of the rivers based on the ecological categories. Full analysis were done in the laboratory which was used to determine potential impact of dams on macroinvertebrate families. The research also focuses on the use of macroinvertebrates as a bioindicator as further river development occurs in Myanmar and their potential as an indicator for environmental flows, and citizen science projects.

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