Experimental and modelling evidence of splash effects on manure borne Escherichia coli washoff

In tropical montane South-East Asia, recent changes in land use have induced increased runoff, soil erosion and instream suspended sediment loads. Land use change is also contributing to increased microbial pathogen dissemination and contamination of stream waters. Escherichia coli (E. coli) is frequently used as an indicator of faecal contamination. Field rain simulations were conducted […]


Special Issue “Multiscale Impacts of Anthropogenic and Climate Changes on Tropical and Mediterranean Hydrology”

This Special Issue published in the Water journal and co-authored by Olivier Ribolzi (IRD-GET) shows the great interest of the scientific community in investigating how to characterize the environmental impact of anthropogenic and climatic changes on Tropical and Mediterranean hydrology, and also in determining which is the main source of changes depending on the regional […]


Effects of hydrological regime and land use on in-stream Escherichia coli concentration in the Mekong basin, Lao PDR

In the basin of Mekong, over 70 million people rely on unimproved surface water for their domestic requirements. Surface water is often contaminated with fecal matter and yet little information exists on the underlying mechanisms of fecal contamination in tropical conditions at large watershed scales. The objectives of this paper were to (1) investigate the […]


Quantifying the effect of overland flow on Escherichia coli pulses during floods: use of a tracer-based approach in an erosion-prone tropical catchment


Understory limits surface runoff and soil loss in teak tree plantations of northern Lao PDR

Many mountainous regions of the humid tropics experience serious soil erosion following rapid changes in land use. In northern Lao PDR, the replacement of traditional crops by tree plantations, such as teak trees, has led to a dramatic increase in floods and soil loss and to the degradation of basic soil ecosystem services. In this […]


Surface and sub-surface flow estimation at high temporal resolution using deep neural networks

Recent intensification in climate change have resulted in the rise of hydrological extreme events. Hydrological processes modelling at high temporal resolution is required to better understand flow patterns at catchment scale. A physically-based model called Hydrological Simulated Program-FORTRAN and two deep learning-based models were implemented to model surface runoff and sub-surface flow in the tropical […]

Discovery of a new open-air Hoabinhian site in Luang Prabang province (Lao PDR). Dating and technological study of the lithic assemblage

The Hoabinhian is a distinctive lithic techno-complex of mainland and Island Southeast Asia. Knowledge of its relationships with key patterns of technological change at a global scale has progressed over the last two decades. However, our understanding of the Hoabinhian as an indicator of evolution during Prehistory can be substantially enhanced by examiningits regional and […]


Building the information system of the French Critical Zone Observatories network: Theia/OZCAR-IS

The French Critical Zone research infrastructure, OZCAR-RI, gathers 20 long-term observatories monitoring and sampling various compartments of the critical zone. Each observatory developed its own data management and distribution systems. The paper presents the common information system Theia/OZCAR IS that was built to make in situ observation FAIR (findable, accessible, interoperable, reusable). Within M-TROPICS, Norbert […]


Experimental and modelling evidence of short-term effect of raindrop impact on hydraulic conductivity and overland flow intensity

Tropical montane areas of Southeast Asia are exposed to high-intensity rainfall during the monsoon period. This is particularly problematic in areas where soils on steep slopes are cultivated as it can lead to heavy runoff, high soil erosion, and water pollution. The objective of this study, performed in the Houay Pano catchment (M-TROPICS/MSEC in Laos), […]