Hydraulic Numerical Simulations of La Sabana River Floodplain, Mexico, as a Tool for a Flood Terrain Response Analysis

The floodplain of La Sabana River, Guerrero State, Mexico, was subject to disastrous floods due to the passage of extreme weather phenomena. This is a situation facing many ungauged rivers in Mexico, as well as in other developing countries, where increased urbanization and a lack of monitoring systems make many inhabited areas more vulnerable to flooding. The purpose of this work is to provide a tool for determining the flood terrain response to flooding based on a hydraulic study. This methodology combines a hydrological analysis of the river basin with the floodplain hydraulic study for the precise identification of overflow points and the resulting flood levels. Results show that, for an ungauged river, hydraulic analysis is an essential tool for determining the main potential flood points and establishing whether the river has the capacity to contain floods. Specifically, it is shown that La Sabana River is predisposed to overflow long before the river reaches its maximum flow, even in correspondence with more frequent flood scenarios. This study shows a further application that a hydraulic model can have to improve flood risk preparedness for ungauged rivers of regions where other types of monitoring tools cannot be used.

ARCHAEOLOGICAL, SOIL AND MICROBIOLOGICAL STUDIES OF THE MOSKVA RIVER FLOODPLAIN DEPOSITS AT THE ZVENIGOROD BIOLOGICAL PLANT

В статье приводятся результаты применения методов почвенно-микробиологического исследования культурных слоев в пойменных отложениях Москвы-реки. Выявлена корреляция пиков численности сапротрофных и термофильных бактерий с горизонтами погребенных почв в толще аллювия, к которым приурочены археологические находки. Показано, что с помощью микробиологических анализов можно выявить следы хозяйственной активности, которая датируется ранним бронзовым веком. The paper describes results of soil and microbiological studies of the occupation layers in the Moskva River floodplain deposits. The study identified a correlation between peaks in the count of the saprotrophic and thermophilic bacteria with the horizons of buried soils in the stream sediments where archaeological finds were made. The paper shows that micro bioassays can help identify traces of economic activity dating to the early Bronze Age.