Schlumberger

Water Engineering - Flood Hazard Management

Flood hazard management to assist governments and public organizations

Schlumberger Water Services (SWS) has used its experience in flood hazard management to assist governments and public organizations by providing reliable analyses of flood potential. This information is used to help clients evaluate the probable impacts and jurisdictional bounds needed to protect residences and businesses from negative effects. SWS experience includes

  • flood and drought frequency analysis
  • precipitation frequency analysis
  • snowmelt modeling
  • hydrologic modeling for probable maximum floods
  • reservoir operation simulation modeling
  • water balance modeling and flood routing
  • hydrodynamic models coupled with GIS applications for flood hazard mapping and floodplain management plan preparation.¬†

SWS projects demonstrating expertise in flood control and drainage include the following:

Flood forecasting model for Red River
Location
- Manitoba, Canada and North Dakota, USA
Client - International Joint Commission
Description - SWS engineers developed a major flood forecasting model for the Red River on behalf of the International Joint Commission. The hydrodynamic model extends 280 km from Grand Forks, North Dakota, to Selkirk, Manitoba. The model was transferred to Manitoba Natural Resources, which uses it in a real-time flood forecasting model with assistance from SWS. The International Joint Commission retained SWS to prepare flood inundation maps of the Red River for evaluation of agricultural damages. This required extending the MIKE 11 1997 and 1826 simulation runs and using MIKE 11 GIS to prepare ArcView shape files of flooded area every 12 hours over a 3-month period.


Floodplain management plan for the Pembina River
Location
- North Dakota, USA
Client - International Joint Commission
Description - The Pembina River periodically overflows the border between the United States and Canada. To help resolve the flooding issues, SWS was retained to develop a comprehensive hydrodynamic model of the river and analyze various flood control scenarios. The work included field investigations, flood frequency analysis, development and calibration of a hydrodynamic model using MIKE 11, and simulation of various flood control scenarios including setback dikes and floodway construction. The modeling approach was presented at a public meeting in the Pembina River Basin.


Integration of Topographic Engineering Center Digital Elevation Model
Location
- North Dakota, USA
Client - US Army Corps of Engineers
Description - The Topographic Engineering Center of the US Army Corps of Engineers has developed a digital elevation model (DEM) of the Lower Pembina River. The Corps retained SWS to integrate the DEM with SWS' Pembina River MIKE 11 model. The work included handling very large datasets (over 1 GB), which required writing specialized computer programs to extract data segments. The DEM was used to confirm cross-section elevations in the floodplain and to generate flooded area maps using MIKE 11 GIS.


Red River dike cumulative impact assessment
Location
- Manitoba, Canada
Client - Manitoba Natural Resources
Description - SWS completed a cumulative dike impact assessment for Manitoba Natural Resources. The work included evaluation of 14 community ring dikes in the Red River floodplain and 2,600 individual flood-proofing projects. The purpose of the evaluation was to determine whether the proposed projects would collectively adversely effect water levels. The impact of the St Mary's Road dike was investigated with and without the other projects, as it is located immediately opposite the Red River Floodway Inlet. A MIKE 11 model of the Assiniboine and Red Rivers was used to model the floodplain flow processes, with and without the proposed dikes.


Nooksack River overflow hydrodynamic modeling
Location
- Washington, USA
Client - Cross Developments
Description - The Nooksack River flows from Mt. Baker in Washington State to Bellingham, north of Seattle. SWS carried out a hydrodynamic modeling study of Nooksack River overflows into Sumas Prairie to assess the impact on water levels of a proposed development. A MIKE 11 model was calibrated for the 1990 flood event, and estimates were made of 100-year and 200-year overflows. The design floods were modeled with and without the proposed development, and its impact on water levels was assessed.


Evaluation of Winnipeg area DEMs for Assiniboine and Red River floods
Location
- Manitoba, Canada
Client - International Joint Commission
Description - In recognition of SWS' capabilities in handling very large DEMs, the International Joint Commission retained SWS to evaluate a DEM developed for the Winnipeg area by a topographic engineering company. The scope of work included determining whether the DEM provided accurate detail for MIKE 11 modeling and preparing flooded area maps of the Assiniboine and Red River floods of 1997 and 1826 using MIKE 11 GIS and the new DEM.