Hannu Lauri

The river flow regime and water resources are highly important for economic growths, flood security, and ecosystem dynamics in the Mekong basin – an important transboundary river basin in South East Asia. The river flow, although remains relatively unregulated, is expected to be increasingly perturbed by climate change and rapidly accelerating soci...

The Upper Mekong Basin is undergoing extensive hydropower development and its largest dams have recently become operational. Hydropower is built to improve the regional energy supply, but at the same time, it has considerable transboundary impacts on downstream discharge regime and further on aquatic ecosystems, riparian livelihoods and food securi...

The world's rivers deliver 19 billion tonnes of sediment to the coastal zone annually, with a considerable fraction being sequestered in large deltas, home to over 500 million people. Most (more than 70 per cent) large deltas are under threat from a combination of rising sea levels, ground surface subsidence and anthropogenic sediment trapping, and...

Climate change poses critical threats to water-related safety and sustainability in the Mekong River basin. Hydrological impact signals from earlier Coupled Model Intercomparison Project phase 3 (CMIP3)-based assessments, however, are highly uncertain and largely ignore hydrological extremes. This paper provides one of the first hydrological impact...

Climate change poses critical threats to water related safety and sustainability in the Mekong River basin. Hydrological impact signals derived from CMIP3 climate change scenarios, however, are highly uncertain and largely ignore hydrological extremes. This paper provides one of the first hydrological impact assessments using the most recent CMIP5...

www.hydrol-earth-syst-sci.net/18/5303/2014/ River tributaries have a key role in the biophysical functioning of the Mekong Basin. Of particular interest are the Sesan, Srepok, and Sekong (3S) rivers, which contribute nearly a quarter of the total Mekong discharge. Forty two dams are proposed in the 3S, and once completed they will exceed the activ...

Many large basins in Monsoon Asia have sparse surface observation networks of hydrometeorological parameters needed for hydrological modelling. These models are often used in water resources related planning, impact assessments and flood forecasting, which sets strict requirements for model accuracy and reliability. The aim of this study was to ass...

The effect of the grid cell size on a distributed hydrological model performance was investigated using five grid resolutions (1, 5, 10, 20 and 50 km) in a model for the Mekong Basin in Southeast Asia. Two main factors affecting computation results and related to topography and the grid cell size were identified: the terrain slope decreases and the...

The Tonle Sap is the largest lake in Southeast Asia and its fishery supports the livelihood and nutrition of millions of people in Cambodia. However, the hydrological and ecological drivers of this ecosystem are changing as a result of hydropower development on the Mekong River and global climate change. The objective of this study was to quantify...

Key Points IOD events have a greater effect on Mekong bank erosion than ENSO events Snow/glacier melt and tropical storms both affect Mekong River bank erosion Mekong flows driving bank erosion have become increasingly variable

The transboundary Mekong River is facing two ongoing changes that are expected to significantly impact its hydrology and the characteristics of its exceptional flood pulse. The rapid economic development of the riparian countries has led to massive plans for hydropower construction, and projected climate change is expected to alter the monsoon patt...

The Mekong River Basin in Southeast Asia is experiencing extensive hydropower development. Concerns have been raised about the consequences of the development for the ecosystems, livelihoods and food security in the region. The largest planned hydropower dam cascade in the basin, the Lancang-Jiang cascade, is currently under construction and alread...

The transboundary Mekong River is facing two on-going changes that are estimated to significantly impact its hydrology and the characteristics of its exceptional flood pulse. The rapid economic development of the riparian countries has led to massive plans for hydropower construction, and the projected climate change is expected to alter the monsoo...

We employ an excess shear stress model of the form E = k(τb-τc), where E is the erosion rate, τb is the boundary shear stress, and k and τc are erodibility parameters (erodibility coefficient, k, and critical shear stress, τc), to estimate river bank erosion at two study sites on the Lower Mekong River (LMR). The bank erosion model is parameterized...

The Gulf of Finland is an elongated estuary located in the north-eastern extremity of the Baltic Sea. This semi-enclosed sea-area is subject to heavy sea traffic, and is one of the main risk areas for oil accidents in the Baltic. The continuous development and validation of operational particle drift and oil-spill forecasting systems is thus seen t...

A distributed hydrological model system with a graphical user interface will be applied to Lake Tonle Sap catchment. The main goal of the modelling project is to estimate the quantity and quality of water ending to the lake from nearby catchment areas, and thus provide input to a hydrodynamic lake model. The Lake Ton Le Sap has interesting hydrodyn...

Hirvi, Juha-Pekka (ed.) Operatiivinen ajelehtimis- ja kulkeutumismalli merialueille, Vesi- ja ympäristöhallinnon julkaisuja - sarja A ; 134, 67-76 Wind data input for the operational §D-model are obtained from the High Resolution Limited Area Model (HIRLAM). This model is at the moment the most consistent source of wind information. The Finnish met...

In: IMEMS 2004 : the seventh International Marine Environmental Modeling Seminar, Washington. D.C., USA, October 19-21, 2004 : proceedings. Oslo, SINTEF. P. 67 (printed abstract), P. 29-44 (full text). [CD-ROM] seventh International Marine Environmental Modeling Seminar, Washington. D.C., USA, October 19-21, 2004