Water Quality Modeling

Development of a Procedure Manual for the Total Maximum Daily Load Program

Streams Tech, Inc. (STI) prepared a guidance document for developing bacteria Total Maximum Daily Loads (TMDLs) for the Virginia Department of Environmental Quality (DEQ) providing the details of potential data sources, data pre-processing methodologies, multi-year hydrologic and water quality model setup, development of TMDL allocations and addressing regulatory requirements to standardize the TMDL development process and the deliverables. Approximately 650 bacteria TMDLs have been developed in Virginia using a detailed approach in quantifying point and nonpoint bacteria sources, developing allocations and planning implementations.

Bacteria Total Maximum Daily Load Development for Tributaries to the Potomac River: Prince William and Stafford Counties

Streams Tech, Inc. developed bacteria TMDLs for waterbodies occupying 137 square miles of Prince William and Stafford Counties in Virginia and predicted water quality conditions using an HSPF model under a variety of rainfall and bacteria loading scenarios.

STI delineated the watershed into smaller subwatersheds by topography and hydrologic connectivity, presenting descriptive data on each subwatershed and stream segment by developing calibrated and validating hydrologic water quality models and developing allocation scenarios. The developed model accounted for point and nonpoint pollutant discharges in the watershed, and results were used to determine effective TMDL allocations. The EPA approved of the TMDL in 2013.

Development of a Hydrologic and Water Quality Model for the Hyco River Watershed

Streams Tech, Inc. developed a watershed model using BASINS/HSPF for Hyco River, which flows from North Carolina into Virginia, and performed initial model setup (e.g. BASINS/HSPF setup, watershed delineation, land use reclassification, FTable generation), weather data and WDM file preparation, hydrologic and water quality calibration and validation of the model for Michael Baker Jr., Inc.

The project involved an eight year simulation of flow and pollutant concentrations on an hourly basis at various locations to determine the assimilative capacity of stream reaches and was used to develop TMDL allocations for various impaired reaches of the watershed.

Stormwater Management

Evaluation of the Stormwater System at Fort Bliss, Texas

A stormwater collection system model was developed to identify problems in the existing stormwater infrastructure of Fort Bliss and find effective solutions to frequent flooding during summer storms. This was done using EPA's SWMM data, Geographic Information System (GIS) data calibrating with observed, site-specific flow and storm data, AutoCAD images of the sewer network, historic data, and data from surveys conducted on-site along with LIDAR survey data.

The model was also used to demonstrate the system's effectiveness in design storms, providing insight as to how it would perform in a variety of rainfall scenarios.

Four Mile Run Watershed Management Program

The Four Mile Run Watershed is one of the most heavily urbanized drainage basins in Northern Virginia, encompassing lands from four jurisdictions. Streams Tech, Inc. provided technical expertise to the Northern Virginia Regional Commission on hydrology, hydraulics, stormwater management, and water quality issues in support of the Four Mile Run Watershed Management Program. An existing model has been updated to EPA's SWMM 5 incorporating latest storm sewer system data, in addition to dealing with other floodplain issues of the system.

Extended Peer Review of Floodplain Results for the East Pasco Watershed

In coordination with Halcrow, Inc. team, STI provided on-call services to Southwest Florida Water Management District (SWFWMD) under the Peer Review of Floodplain Results contract.

A peer review was performed, which addressed the reasonableness of modeling and results used to update the floodplain delineations as part of the District’s Cooperating Technical Partner (CTP) responsibility to provide accurate digital flood maps.

Water Supply Modeling

Development of the Water Distribution System Model for McAlester, Oklahoma

Streams Tech, Inc. developed a comprehensive water distribution and management system model for McAlester, Oklahoma that simulated pipe flow hydraulics, such as dynamic flow rates and pressures throughout the distribution system.

The model helped to evaluate the existing water networks, optimizing the flushing program, and assess the current capacity and performance of the distribution system at any location. This could be used to plan for expansion (such as optimal sizing of new water main), potential locations for new towers and pumps, and other future development.

GIS Based Services:

GIS Portal

Product Type: Web based GIS application Client: LGED, Bangladesh
GIS Portal is a web application developed under the project- Development of GIS Based Web Mapping Application for Project Planning of LGED. It enables users to prepare customized GIS maps, particularly to generate LGED’s road network map. Besides it plays the role of a decision support tool by providing project specific map generation and reporting options in the planning and monitoring activities. These features include identification and reporting of duplicate roads in project planning, estimation and mapping of a particular road or school served areas, and preparation of countrywide road density (proportion of paved roads) map. This project had another scope, to set linkage between mapping shape files with the central GIS database of LGED which have been successfully accomplished.


Product Type: Web GIS application for Mobile Devices Client: Mass people, Water resource engineers

The Water Map has been developed with an aim to provide a sustainable solution for the worldwide potable water resource management. Emphasizing on the crowd-sourcing, this app primarily connects mass people (non-technical) in contributing information for identification of the water sources, quality indicators and water use information. However, it also provides a base platform for the technical users to incorporate relevant water information.

Key features:

  • Nearby potable water source search or detection at local level
  • View and analyze water source accessibility and quality
  • Evaluate source capacity and demand-supply condition
  • Contribute to add or edit water source data used by the app
  • Monitor and notify water source condition to the concerned authority
  • Detect potential source hazards

eMOS (e-Management Operating System)

Product Type: Planning and monitoring application. Client: Clear Innovation Technology Solutions, LLC

eMOS is a web based planning and monitoring application. It provides an easy way to create plans and enter actual data. It allows an organization to configure its departments, teams, members and resources with few clicks. eMOS dashboard and rich set of reports help not only to evaluate performance but also to increase efficiency. Instead of focusing on processes, eMOS allows the organization to focus on people and ensures their collaboration in attaining the company’s objectives. It optimizes resource allocation and ensures proper time management thereby improving the company’s productivity and streamlining the business processes. Streams Tech is providing complete software development, quality assurance and maintenance support for eMOS.

Key features:

  • Activity plan/log and reporting
  • Dynamic dashboard creation from widget gallery
  • Data feed development for analytics
  • Customized role based access control
  • Fully customized role based access control
  • Organization wise departments, teams and resource set-up
  • Graphs and metrics can be customized with preferred data

Our Mobile Applications:


Product Type: Web based Mobile Application Client:BRTC Institute, BUET of Bangladesh, and ILO
SytePad is a survey application for handheld devices that runs on Android, iOS and Windows 8. Using this application, field surveyors can perform offline field surveys. There is a web based administration panel that allows administrators to create questionnaire for the survey. The type of the questions allows custom branch conditions based on some answers, multilevel grouping in questions, repetition of some questions and more. The questionnaire set by the administrator can then be downloaded in the mobile device and survey can be performed without any further communication with the server. Survey can be performed as many times as required and after completing the surveys, the data can be sent to the central server. While doing the survey, any number of images can be captured with every question, custom comment can be added, free hand sketch can be drawn and GPS location can be captured for GIS based analysis. The application allows generation of summary report based on the collected data.


Product Type: Web application for Mobile Devices Client:Businessmen, general people (customers)
LloydsList is a mobile based buying and selling application that allows location based product searching. It uses GIS based intelligence to suggest items that are available within the user’s preferred distance settings. Users can maintain their product list that they want to sell. Users can search for products based on categories and view product images and video. After choosing an item, user can communicate with the seller and finalize the purchase.

BI Services: Data Processing and Analysis


Gapminder is a non-profit venture promoting sustainable global development and achievement of the United Nations Millennium Development Goals by increased use and understanding of statistics and other information about social, economic and environmental development at local, national and global levels. We are like a modern “museum” that helps making the world understandable, using the Internet.

Gapminder is currently using a hand-made relational dataset built in an extremely unconventional manner with linked Google Spreadsheets maintained by multiple people. The scope of this project is to collect & merge publicly available datasets over internet with the existing Gapminder data.

Few of the data providers are: