Wednesday, June 22, 2011

Cruise ship pollution

When a cruise ship or passenger ship is in the middle of the sea, it creates a number of wastes that are harmful to the marine environment. From the operation of the ship alone, large amount of smoke is released into the air. The smoke pollutes the atmosphere with CO2, CO and other toxic gases.
A cruise ship with a capacity of more than 5000 passengers can be considered as a small floating village or town. The cruise ship produces huge quantity of solid and liquid wastes that have to be properly treated to minimize negative impacts which they bring to the marine and land environment. For example, the gray water. Even though gray water consists mostly of organic material, it should not be released into the shallow waters where there are coral reef because this fragile ecosystem will die if the water is saturated with nutrients. So, the graywater has to be filtered to separate solid wastes from it before it can be released into the sea.
Special waste processing devices inside a cruise ship are used to reduce the volume of plastic and metal wastes so that they will not consume a lot of spaces inside the ship's compartment. When the cruise ship arrives at one of her ports of call, the wastes can be transferred to land for further processing. 

The above Youtube Video shows how MSC Fantasia cruise ship promotes herself as a marine vessel that respects marine habitat. To minimize air pollution, the ship uses low-sulphur fuel. To conserve energy, the cruise ship uses energy efficient light bulbs in all of her passenger cabins and public lounges. Energy efficient air conditioning system significantly reduces fuel consumption of this vessel. Improvements in ship design towards a more environmentally friendly ship is a positive step in maintaining the growth of marine tourism industry without harming the precious marine environment.

Tuesday, June 21, 2011

Louvre glass windows of a Wooden House

Louvre glass windows are commonly used in timber framed houses in tropical region. The minimum thickness of the glass is 3 millimeter. The following photograph shows the passive ventilation of a house in Wasior town of West Papua province of Indonesia. The glass windows attached inside wooden frames were installed around the outer walls. Below the corrugated clay roofs are the jalousie windows made of timber. Because the humidity in this tropical island is high, the louvre and jalousie windows greatly reduce the moisture inside the wooden house and improve the indoor air quality of the rooms.
We all know that the temperature in tropical region is quite high between 30 to 32 degrees Celcius during the days. Louvre glass windows can enhance the air circulation inside a house without the help of fan. The maintenance cost is also low. However louvre windows are not suitable for passive ventilation in cold region. by Charles Roring
Also read: Wooden house for eco-tourism program

Sunday, June 19, 2011

Wooden Houses Jalousie Windows

Earthquake resistant wooden houses in tropical region often use jalousie windows (usually located above or beside the glass windows) as ventilation system for the cooling of rooms. Generally glass louvred jalousie windows are installed at the front walls near the verandah or at the living room where house owners receive their guests. The louvre windows brighten the indoor rooms because they allow not only the fresh air to enter the houses but also the sunlight. To filter the dust from the street from flying into the rooms, house owners usually install transparent curtain sheets or drapes behind the glass louvred windows. The curtain also improves the privacy of the house owner because people cannot easily see the interior of the house except at nights when the lamps are on. Hardwood jalousie windows can usually be seen in the walls of bedrooms. The combination of jalousie hardwood ventilation holes with glass louvred windows is the most common type of ventilation system in tropical houses. Because wooden houses use timber for the frames, walls and windows, they have to be specially treated. Wooden structures need to be covered with paints or varnished to protect them from water vapor that can cause them to rot. 
In tropical region, jalousie windows are considered environmentally friendly because they don't need electrical energy to enable air circulation. This ventilation system allows trade wind to flow naturally into and out of a house. However, malaria is a serious disease in tropical region, all of the jalousie louvre windows have to be covered with mosquito nets to prevent mosquitoes from entering the house, especially the bedrooms at nights. by Charles Roring

Sunday, June 12, 2011

Wooden House for Eco-tourism Program in Arfak Mountains

I have just finished designing a wooden house for an eco-tourism program in Arfak mountains of Manokwari regency of West Papua. I used Google Sketchup Pro version 8 to create this new tourist house. The wooden house will be constructed in the middle of a tropical jungle below Mt. Soyti some two kilometers away from Kwau village, a trekking and birding destination for tourists who want to experience the natural beauty of the tropical rainforest of New Guinea island.
After designing the wooden house and composing a proposal for its construction, I gave it to Hans Mandacan, one of the villagers. He will lobby the government officials both in tourism agency and department of forestry of West Papua province and Manokwari regency. According to Hans, the officials give positive comments for the project. However, they need to get approval from the legislative council for the next year budget's allocation where the tourist house will be included in their list.
I hope that this wooden house will boost the eco-tourism program in Arfak mountains and at the same time increase the prosperity of the indigenous Papuan people who live in the region. Wood as the main material for the construction of this wooden house will not be taken from the nearby forest but from the town of Manokwari. I suggest to Hans to seriously preserve the tropical trees in their village's territory. by Charles Roring
3 Oct 2012 Update
The wooden house for tourists is now being constructed in Arfak mountains. The design which I created has been changed by the contractor. I haven't seen the new design but I hope that it will be comfortable for the tourists.
7 April 2013 Update
The physical construction of the guesthouse has finished. There finished house is different from the above design. It is built above the ground and fully made of iron wood. Guests who want to stay in this guesthouse are required to bring their own sleeping bag. Please, contact me, by email to if you plan to go to Arfak mountains.  So far two guests already stayed in the house - one from the Netherlands and the other from Singapore. The rate is Rp. 100,000/person/night or approximately 11 US dollars/person/night.  by Charles Roring

Thursday, June 2, 2011

Coral reef fish - juvenile black damsel

The underwater picture of this juvenile black damsel (Neoglypphidodon melas) was taken in the bay of Manokwari city. This coral reef fish is unique because its colors will change to black when it becomes adult. The main characteristics of this fish is the yellow stripe that extends from snout to rear dorsal fin and the blue ventral and anal fins with black frontal margin. Mature black damsel is dark. If we do the snorkeling in the morning especially when the weather is clear with full sunlight, the yellow colors of this coral reef fish will look bright. Sighting of this unique damselfish occurred at around 4.30 p.m. At that time the weather was cloudy. Alex Sokolov who was a Russian snorkeler took the picture of this coral reef fish at the depth of around 3 meters below the surface of the sea.
In addition to the above black damsel, the coral reef in the Dorey bay of Manokwari is home to surgeon fish, lion fish, parrotfish, anemone fish and many others that I cannot mention one by one in this post.
As a tour guide, I provide snorkeling packages to tourists who want to explore the coral reef of Manokwari. I know places in the bay that has got abundant reef and marine life. In addition to snorkeling, visitors can also do other activities when traveling in Manokwari. They can go trekking in Arfak range to see the tropical rainforest and watch paradise birds. They can camp in the jungle accompanied by our local guides and they can have a picnic by a river.
This is my email: When you write an email, please, provide such information as the dates of your trip, the number of guests and what activities that you are interested in doing while in Manokwari. I will reply your email by providing detailed explanations for your trip in this tropical island. by Charles Roring.
Also read:
Coral reef fish in Mansinam island

Wednesday, June 1, 2011

Coral reef fish in the bay of Manokwari

There are hundreds of species of coral reef fish in the Dorey bay of Manokwari city. To watch them, we just need to wear snorkeling masks and swim over the coral reef in the morning or in the afternoon before sunset. To get to the place where the coral reefs are still in pristine condition, we hire a fisherman boat. The coral reef fish can easily be photographed by snorkelers at the depths of 1 to 3 meters. If the depth of the sea water is more than 3, snorkelers have to go down and take the pictures of the fish. Unfortunately the quality of the underwater pictures will not be so good because of the unstable position the snorkelers have in the water.
The bay in Manokwari city is a nice snorkeling site for tourists who want to see the beauty of the underwater world of coral reef in affordable cost. Just bring your snorkeling gear before flying to Manokwari. I will bring you to places where you can enjoy snorkeling as much as you like.
Coral reef is the tropical rainforest of the sea. It absorbs CO2 gases and release Oxygen during the photosynthesis.
Also read: Coral reef in Manem islet