Lake Management
Location
Al Mouj Waterways, Muscat, Oman
Parameters
Dissolved oxygen, phosphorus, total nitrogen, pH, total dissolved solids
Type of case study
Lake management
Date
August – October 2018
Introduction
Al Mouj Muscat is a sophisticated waterfront community in Oman, blending residential buildings, parks, trails, and inland waterways with shopping, dining, and entertainment options. It features the only PGA-caliber golf course in Oman, created by Greg Norman. Commencing in 2006, the project includes approximately 1,400 residential units and is designed after traditional Omani architecture. When finished, the 124,560 m² of canals can contain 211,752 m3 of water, and 12,900 m3 of seawater is added every day via submerged pipelines.
The Problem
Eutrophication, or hypertrophication, is a frequent form of pollution in open waters that is occurring in the Al Mouj rivers. Excess nutrients, especially phosphates, cause algal blooms and oxygen depletion, which is how this happens. There have been high detections of dissolved solids, coliform bacteria, and total nitrogen, which suggests sewage, fertilizers, or detergent-related pollution.
A visual study of Al Mouj Waterways, October 24, 2017.
In Al Mouj Waterways, the following ecological effects have been observed:
A visual study of Al Mouj Waterways, October 24, 2017.
In Al Mouj Waterways, the following ecological effects have been observed:
- Increased phytoplankton and algae biomass
- More frequent zooplankton blooms
- Decreased water transparency
- Concerns with color and odor
- Depletion of dissolved oxygen, and
- Deterioration in the water body’s
Aesthetic values are just a few of the biological challenges that the Al Mouj Waterways are dealing with.
Recommended Solutions :
Keeping dissolved oxygen levels high is essential for sustaining beneficial bacteria and avoiding eutrophication in ponds and lakes due to their small ecosystems. The streams of Al Mouj are especially vulnerable because of their slower water flow and warmer temperatures. Since standard aerators are frequently expensive and inefficient, using two Nanoxy Series nanobubble generators is advised. With prompt action, the treatment seeks to:
- Eliminate offensive odors
- Lessen algae growth
- Improve water clarity
- Lessen sludge accumulation
- Maintain the natural equilibrium to avoid sick lake syndrome
Implementation :
Avior Aqua is a water technology company that specializes in nanobubble treatments. There is no construction involved in the Nanoxy installation process, making it simple. After obtaining the power supply, our group finished the setup in a single day. Two Nanoxy machines were positioned according to topology, hydrometric data, and water analysis for the best test outcomes.
Results :
Visual observations
Before
After
Water Analysis:
Summary of the most important parameters :
| Parameters | Units | Starting | 2/10/2018 | Difference |
|---|---|---|---|---|
|
pH |
|
7.8
|
8.1
|
+3%
|
|
Dissolved oxygen |
mg/L |
– |
7.01 |
n.a |
|
Fecal coliform |
cfu/100ml |
53 |
Not detected |
-100% |
|
Escherichia coli |
cfu/100ml |
26 |
26
Not detected
|
-100% |
|
Phosphorus |
mg/L |
0,32 |
<0.1
|
-100% |
|
Total Nitrogen |
mg/L |
1.85 |
1.45 |
-27% |
|
Nitrates(N3) |
mg/L
|
7.74 |
1.4 |
-82% |
|
Total dissolved solids |
mg/L |
37760 |
39250 |
+3% |
Conclusion
By addressing important problems like odor, hazardous bacteria, and water transparency quickly, our approach reduces nutritional pollutants (phosphorus, nitrates, and nitrogen) by 100% and 82%, and with dissolved oxygen levels over 6 mg/L, the lake’s natural balance is restored, preventing hazardous algal blooms in the future. Our method encourages the growth of aerobic organisms, thereby reactivating natural self-cleaning mechanisms.