01 / FLOOD MODELLING
Hydraulic modelling & flood mapping
HEC-RAS 1D/2D and TUFLOW modelling, floodplain mapping, flood impact and inundation assessments.
Independent engineering consultancy · Melbourne, Australia
Specialist Hydrology &
Hydraulic Modelling Consultant
Practical flood modelling, catchment hydrology and surface-water engineering support for consulting firms, government agencies and infrastructure projects.
Discuss a project →Bishnu Prasad Gautam | CPEng · NER · RPEV · MIEAust
What I do
Specialist engineering services
Independent technical support for flood studies, model development, project delivery and peer review. Available for project-based and subcontract assignments.
02 / CATCHMENT HYDROLOGY
Rainfall–runoff analysis
HEC-HMS, RORB and other hydrologic models; design flood estimation, catchment analysis and flood hydrographs.
03 / WATER INFRASTRUCTURE
Stormwater & drainage
Stormwater management, drainage assessments, culvert and waterway hydraulics, and practical mitigation options.
04 / ASSURANCE
Independent technical review
Hydrologic and hydraulic model checking, sensitivity assessment, technical documentation and quality assurance.
05 / WATER RESOURCES
Water resources assessment
Catchment yield, water balances, environmental flows, climate scenarios and infrastructure planning support.
06 / GIS & DATA
GIS and modelling support
QGIS/ArcGIS terrain processing, catchment delineation, spatial analysis, hydrological data and reporting.
Professional background
Experienced, technically hands-on engineering support
I am a Chartered Professional Engineer and Registered Professional Engineer of Victoria with more than 35 years of international engineering experience, including over 13 years in Australia, working across hydrology, hydraulics, floodplain management, stormwater engineering and water resources management.
My background includes consulting roles with Hatch in Australia and Canada, as well as senior technical and project delivery positions with the Northern Territory Government, Wollongong City Council, the South Australian Government and Otago Regional Council in New Zealand.
Project experience includes Barrow Island Airport flood mitigation, Gorgon stormwater drainage, Murray River hydraulic modelling and a Territory-wide hydrological modelling program covering 20 major river basins.
Current technical investigation
Rasuwa–Trishuli flood & debris-flow modelling
Independent study · In progress
Nepal, 2026
Ongoing independent hydraulic modelling investigation of the Rasuwa–Trishuli river system, using HEC-RAS, digital elevation data, satellite imagery and GIS.
Current work includes river geometry development, flood-wave scenario testing, hydraulic stability checks and examination of model sensitivity to roughness and boundary conditions.
This study is not yet complete. No results are presented as calibrated or validated findings. Event photographs and actual modelling figures may be added after source, permissions and technical checks.
Get in touch
Discuss modelling support for your next project
Available to discuss hydrologic and hydraulic modelling, independent review and subcontract engineering assignments.
Email an enquiry →Bishnu Prasad Gautam
Specialist Hydrology & Hydraulic Modelling Consultant
Email: bgnepal74@hotmail.com
Phone: 0425 478 038
Location: Melbourne, Victoria, Australia
ABN: 85 709 603 277
Independent sole-trader engineering services. Project scope and professional engagement terms to be agreed before work commences.