The monitoring of important components of ecosystems is critical for implementing effective environmental management. However, due to the spatial and temporal heterogeneity of water bodied coupled conventional sampling methods often result in inadequate monitoring and characterization of water quality. Meanwhile, the application of remote sensing to assess inland water production has escalated recently because its capability of scanning wide water bodies within a short time period. Consequently, a combined approach utilizing the spatial and temporal coverage of remote sensing with conventional water sampling provides potentially effective solution to monitoring fresh water ecosystem. In relation to water quality, sediments transport and erosion is a complex natural process that is strongly affected by human activities such as deforestation, agriculture and urbanization. In particular, sediment play a key role in controlling water quality and it can cause a major reduction on stream capacity for handling flood waves. Sediment is the most common constituent both in weight and volume in surface waters of fresh water systems. Thus, especially for turbid rivers, the effect of the other optical active substances on the satellite data is negligible. The Mekong River is Asiaâs third largest river in terms of length and sediment load. It receives enormous public attention in Asia because the river runs through six countries and approximately 60 million people live on or dependent on the Mekong basin.
Last date updated on June, 2014