Aquatics

Interactive Map Overview

  • An interactive map can be used to investigate floodplains and flood hazard areas.

  • Educators can create lesson plans focusing on flood risk investigations, including:

    • Identifying areas for potential buyouts to relocate individuals at high risk of flooding.

    • Identifying areas for restricting new development due to high flood hazard risk.

Pollution Topics

Nonpoint Source Pollution

  • This year's special topic revolves around nonpoint source pollution, beginning at home.

  • There are two types of pollution:

    • Point Source Pollution

    • Defined as specific locations where pollutants are permitted to discharge into the environment.

    • Typically regulated through permits (e.g., wastewater treatment facilities).

    • Example: A facility releases a permissible level of waste into a water body following Clean Water Act regulations.

    • Nonpoint Source Pollution

    • More diffused sources where pollutants can't be easily traced back to an origin.

    • Common example: Stormwater runoff.

    • Discussed methods to improve nonpoint source pollution will be a focus.

Water Quality Standards in Texas

  • The Texas Commission on Environmental Quality (TCEQ) sets surface water quality standards approved by the Environmental Protection Agency (EPA).

  • These standards aim to meet:

    • Public health and recreational enjoyment

    • Protection of aquatic life

Monitoring Water Quality

  • Monitoring occurs primarily for two purposes:

    1. Public Health and Enjoyment

    • Evaluated using recreational use standards (primarily focused on bacteria).

    • Use of pathogen indicator bacteria, chiefly E. Coli in freshwater and Enterococci in saltwater, as proxies for potential pathogens.

    • High concentrations increase the likelihood of illness.

    1. Aquatic Life Use

    • Measured through levels of dissolved oxygen, which is critical for aquatic organisms.

    • Other parameters monitored include nutrients, water temperature, and pH.

    • Fish consumption standards ensure the safety of fish and invertebrate consumption from waterways.

Understanding Recreational Use

  • The EPA assesses acceptable risk levels for E. Coli and Enterococci concentrations in water to define safe recreational use.

  • Wastewater treatment plants are regulated to manage bacteria outputs to maintain water quality.

Addressing Bacteria Pollution

  • Nonpoint source strategies include:

    • Encouraging the use of wetlands to filter pollutants, termed "nature's sponge."

    • Promoting bioswales and rain gardens to capture and treat runoff before it reaches waterways.

    • Community efforts such as picking up pet waste to reduce dog-related bacterial pollution.

Dog Waste Impact

  • In Houston, an estimated 1,000,000 dogs contribute over 315 tons of dog waste daily, which can wash into waterways after rain.

  • This significant contribution underscores the necessity of responsible pet ownership.

Monitoring and Investigating Water Bodies

Bacteria Monitoring Process

  • Targeted Bacteria Monitoring involves examining areas with high bacteria levels, typically carried out during dry conditions.

  • Investigators sample from specific outfalls to identify pollution sources:

    • Instances of raw sewage, broken conveyance lines, or illegal connections have been discovered.

    • Homeowner assistance programs help in correcting illicit sewer connections for those who cannot afford repairs.

Livestock and Water Access

  • Livestock can contribute to pollution through direct access to waterways; their fecal matter carries pathogens.

  • Educating and providing resources for farmers to limit livestock access to streams helps reduce contamination.

Dissolved Oxygen and Aquatic Health

  • Dissolved oxygen levels correlate with aquatic life health; low levels stress fish, reducing reproduction rates and potentially leading to fish kills.

  • Texas Parks and Wildlife and the Texas General Land Office respond to fish kills and investigate causes to identify responsible parties and ensure accountability.

Factors Influencing Fish Health

  • Fish can suffer from kills due to:

    • Low dissolved oxygen levels exacerbated by high temperatures (increased temperature = reduced oxygen capacity).

    • Environmental changes necessitating strong riparian zones to maintain stable temperature and shade waterways.

Nutrient Management and Eutrophication

  • Introduction to Eutrophication as a critical concept affecting water quality.

  • Temperature increases can result in harmful impacts on species ranges and introduce more invasive species.

Health Implications of Pollutants

  • PCBs and Dioxins are monitored under advisories related to human consumption of fish from contaminated water.

  • Accumulation of these pollutants in the human body occurs, particularly affecting women of childbearing age and children via breastfeeding.

Understanding Biotic Integrity

  • The Index of Biotic Integrity (IBI) enables assessment of water body health based on the species composition:

    • Predominance of tolerant species suggests poor health, while a diversity of intolerant species indicates better water quality.

Data and Resources for Educators

  • Multiple water quality data resources can support interactive learning for students, including:

    • How's My Waterway Tool (EPA) to assess local water quality.

    • Water Resources Information Map (RIM) for ongoing management in Houston.

  • These tools empower students to explore and analyze real data on local waterways, identifying potential issues and solutions.

Conclusion and Resources

  • For students preparing for environmental challenges (e.g., Envirothon), resources and case studies can enhance their critical thinking.

  • Educators are encouraged to utilize provided materials and seek help for any questions.

  • Encouragement towards community engagement and awareness of flood risk and mitigation strategies to protect water quality and promote sustainability in development.

  • Important links related to floodplain information and interactive mapping resources are crucial for informing community members and future homeowners regarding flood risks.