Marko C.
HEC-RAS & HEC-HMS Specialist | QGIS Expert | Stormwater Management
I am a civil engineer specializing in hydraulic and hydrologic modeling for river regulation, floodplain mapping, stormwater systems, and watershed management. My work includes HEC-RAS 1D and 2D modeling, HEC-HMS hydrology, and QGIS stream and catchment delineation. I have extensive experience in designing and analyzing rivers, bridges, culverts, and dams, as well as developing floodplain and floodway maps in compliance with FEMA and local standards. I started building HEC-RAS models during my bachelor’s studies and expanded my expertise in QGIS and HEC-HMS during my master’s research and professional work. Over time, I have contributed to all phases of water management projects—from conceptual studies to detailed design. My experience in water resources management includes: • Hydraulic modeling of open-channel flow and flood hazard quantification. • Hydrologic and hydraulic analyses for flood control dams within detailed watershed studies. • Bridge and culvert hydraulic analyses to determine design flood elevations and required freeboard for lower chord placement. • Design support for large-scale highway drainage systems. • Full project involvement in run-of-the-river hydropower plants (>5 MW and several <1 MW), covering dam design, headwater, and design discharge calculations. Currently, I serve as a Senior Associate on river regulation and flood and drought protection projects. I am a dedicated professional committed to high-quality, transparent work and maintaining clear communication throughout every project. Areas of expertise include: • Developing advanced HEC-RAS 1D and 2D hydraulic models using the latest versions, with detailed result visualization and map-based presentation in RAS-Mapper. • Building and calibrating HEC-HMS hydrologic models to generate accurate runoff hydrographs for ungauged streams and to verify and align them with gauged catchments, ensuring reliable flow inputs for HEC-RAS simulations. • Performing QGIS-based stream and catchment delineation, watershed preprocessing, and terrain analysis to support hydrologic and hydraulic model setup. • Conducting floodplain and floodway modeling in accordance with FEMA and local regulatory standards. • Managing both urban stormwater and rural drainage systems by integrating open-channel and closed-conduit networks, and coupling HEC-RAS 2D surface flow modeling with EPA SWMM for comprehensive stormwater management. • Experienced in watershed hydrology, hydrologic and water resources modeling, and simulation. • Proficient in Aquaterra by CGS Labs for river and channel engineering design. • Experienced in using AutoCAD and Civil 3D on a daily basis to complement hydraulic and hydrologic modeling workflows.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $495
Billed in all: $30,225$30k
$495 in the last 6 months
Across 12 contracts
Earnings, last 30 days
Skill rankings: Top 37% in QGIS
Ranked by MRR among everyone on Upwork with the skill.
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- #21HEC-RAS46 freelancers · 🇧🇦 #1Top 46%🇧🇦#1 of 1
- #30Hydrology72 freelancers · 🇧🇦 #1Top 42%🇧🇦#1 of 1
- #41Hydraulic Engineering86 freelancers · 🇧🇦 #1Top 48%🇧🇦#1 of 1
- #225QGIS607 freelancers · 🇧🇦 #2Top 37%🇧🇦#2 of 3
- #270AutoCAD Civil 3D669 freelancers · 🇧🇦 #5Top 40%🇧🇦#5 of 8