JDMA offers a wide range of hydrometric analyses and terrain analysis services (remote sensing, GIS, field mapping and sampling and geospatial modelling) to interpret and evaluate surficial hydrology. Among various applications, JDMA’s expertise in using terrain analysis for hydrological and watershed modelling has been used to evaluate drainage basins for hydroelectrical potential, to characterize surficial water resources and linkages to shallow groundwater, and to evaluate historical changes in landscapes and water levels.
JDMA has undertaken hydrometric analyses to assist in streamflow and watershed characterization, for flood frequency analysis (to determine the magnitude and frequency of flooding events), for assessment of erosion and bank stability issues, and for application of analytical models. We use an integrated terrain analysis approach to generate watershed models and analyse surficial water flow. Historical airphotos and satellite imagery in conjunction with DEM, hydrometric and meteorological gauge data are used to evaluate historical changes and assess possible future trends. A GIS-based model has been developed to identify potential hydroelectric sites based on digital elevation models of drainage basins, gauge data and stream gradients. Regional models have been applied province-wide and detailed models at specific sites.
Water control projects on agricultural land require delineation of often subtle drainage pathways on low-relief farmland and assessment of areas that may become flooded following the construction of small dams, dykes or other water control structures. JDMA is proficient at acquiring data and imagery required for project planning and preparing permits for regulatory approval.