Related Experiment Video
Updated: Mar 24, 2026
12:44
Watershed Planning within a Quantitative Scenario Analysis Framework
Published on: July 24, 2016
8.7K
New direction for environmental water management.
Akio Tomita1, Yoshio Nakura1, Takuya Ishikawa1
1Ministry of the Environment, Japan.
Marine Pollution Bulletin
|March 9, 2016
Summary
Japan
Area of Science:
- Environmental Science
- Marine Biology
- Environmental Policy
Background:
- Post-1960s high economic growth in Japan led to severe water pollution and ecological damage.
- Industrialization resulted in accumulated pollutant loads impacting aquatic ecosystems and fisheries.
Purpose of the Study:
- To evaluate the effectiveness of the Total Pollutant Load Control System (TPLCS) in improving coastal water quality.
- To outline Japan's new environmental policies addressing biodiversity conservation and emerging marine environmental issues.
Main Methods:
- Implementation of the Total Pollutant Load Control System (TPLCS).
- Monitoring of key pollutant parameters: Chemical Oxygen Demand (COD), total nitrogen, and total phosphorus.
Main Results:
- Significant improvement in coastal sea water quality attributed to TPLCS.
- Persistent legacy pollutant loads and emerging environmental concerns requiring new management strategies.
Conclusions:
- TPLCS effectively reduced pollutant loads and improved water quality.
- Japan is transitioning to a new environmental management phase focused on biodiversity and marine ecosystem health.
Keywords:
BeautifulBio-diverseBustling-with-people and bountiful seaEnclosed coastal seasSato-umiSeto Inland SeaTotal Pollutant Load Control System (TPLCS)Water quality controlMore Related Videos
Related Concept Videos
01:30Environmental Applications of Microorganisms
1.4K
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
1.4K
01:19Quality of Water
645
In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...
645
01:26Regulation of Water Output
2.5K
The human body predominantly expels water through the urinary system. On average, an individual generates around 1.5 liters of urine each day. This amount can fluctuate based on how well a person is hydrated, but a critical minimum quantity of urine must be produced to ensure the body's proper functioning. Daily, the kidneys remove 600 to 1200 milliosmoles of dissolved substances, effectively excreting excess minerals and water-soluble toxins such as creatinine, urea, and uric acid from the...
2.5K
02:41Responses to Drought and Flooding
12.4K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
12.4K
01:17Design Example: Analyzing Capacity Contours for Flood Risk Assessment
358
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
358
01:29Disorder of Water Balance
2.8K
Water balance disorders are medical conditions that occur when there is a deviation from the body's water volume or osmolarity, disrupting normal homeostasis and leading todehydration, hypotonic hydration, hyperhydration, edema, or water intoxication.
Dehydration
Dehydration occurs when the body loses fluids (particularly water).
Causes:
The major causes of dehydration include excessive sweating, fever, vomiting, diarrhea, and diuresis.
Signs and Symptoms:
Symptoms primarily include intense...
Dehydration
Dehydration occurs when the body loses fluids (particularly water).
Causes:
The major causes of dehydration include excessive sweating, fever, vomiting, diarrhea, and diuresis.
Signs and Symptoms:
Symptoms primarily include intense...
2.8K