ADA APA DENGAN DANAU TONDANO?!?1?

Summary

This presentation offers an insightful review of Lake Tondano, the largest natural lake in North Sulawesi, Indonesia. Highlighting its physical characteristics, social functions, and challenges, the speaker, a geography student from UGM, delves into the lake's ecological significance and the impact of human activities. Addressing issues like sedimentation, erosion, and water quality decline, the presentation concludes with suggestions for sustainable management and conservation efforts to preserve this vital ecosystem.

Takeaways

• 😀 The presentation is about the review of Lake Tondano, the largest natural lake in North Sulawesi province.
• 📘 Lake Tondano is part of the Tondano River system and is situated in Minahasa Regency, known for its volcanic caldera formation.
• 🌡 The lake's water temperature ranges from 23 to 28 degrees Celsius, with dissolved oxygen levels between 4.5 to 7.5 mg per liter.
• 🌊 The lake's surface area varies seasonally, being 46 km² in the dry season and 51 km² in the rainy season.
• 🏞️ Surrounding land use is predominantly agricultural, which may contribute to sediment and nutrient loads entering the lake.
• 🚰 Lake Tondano serves as a water supply for Manado and Minahasa, and also plays a role in flood control and hydroelectric power generation.
• 🐟 The lake is used for irrigation and fish farming, with fish culture being an important economic activity for the local population.
• 🌳 The local Minahasa culture has a deep connection with the lake, with traditional settlements known as 'people of the water' or 'tahu danu'.
• 🌧️ The average annual rainfall affects the lake's water balance, with variations between 1500mm to 2804mm per year.
• 🏠 The lake's watershed spans seven sub-districts and 27 villages, with the majority of the population being farmers and fishermen.
• 🔍 Key environmental issues include sedimentation and erosion, which are exacerbated by the high number of inlets and human activities around the lake.

Q & A

What is the main topic of the presentation?

The main topic of the presentation is a review of Lake Tondano, the largest natural lake in North Sulawesi province, Indonesia, covering its physical characteristics, social functions, and the issues occurring in the lake.

Who is presenting the task?

The presenter is a student named Savira from the Faculty of Geography, University of Gadjah Mada, majoring in Environmental Geography, and is part of the 2019 cohort.

What is the geographical location of Lake Tondano?

Lake Tondano is located in Minahasa Regency, North Sulawesi Province, Indonesia, and is situated in the equatorial region at an altitude of approximately 600 meters above sea level.

What is the significance of Lake Tondano being a caldera?

Lake Tondano is a caldera lake, which means it was formed by the collapse of a volcanic mountain, Tondano, after a series of paroxysmal eruptions in the late Pleistocene to early Holocene period.

What are the variations in the surface area of Lake Tondano during different seasons?

The surface area of Lake Tondano varies between 46 km² during the dry season and 51 km² during the rainy season.

How many rivers contribute to Lake Tondano, and what are the main contributors?

There are 35 rivers that contribute to Lake Tondano, with three main rivers being the Mengawal, Panas, and Lene Ko rivers.

What is the average water temperature of Lake Tondano?

The water temperature of Lake Tondano ranges between 23 and 28 degrees Celsius.

What are the main land use activities around Lake Tondano?

The primary land use activities around Lake Tondano are agriculture and plantations, which can contribute to sediment and nutrient loads entering the lake.

What are the main economic activities of the communities living around Lake Tondano?

The main economic activities of the communities around Lake Tondano are farming and fishing, with each accounting for about 45% of the population's livelihoods.

What are the main environmental issues affecting Lake Tondano?

The main environmental issues affecting Lake Tondano are sedimentation, erosion, and eutrophication, which are exacerbated by agricultural, fishing, and land use activities around the lake.

What are some of the suggested measures to address the issues in Lake Tondano?

Some suggested measures include creating and enforcing regulations regarding land use around the lake, relocating settlements, reforestation, and utilizing aquatic plants for crafts, organic fertilizer, and livestock feed.