drrr

UNDERSTANDING THE NATURAL SITUATION

​WHAT IS SINKHOLE?

A sinkhole is a hollow or low place in the ground surface, where water dissolves and removes soil and rocks, especially limestones. It can communicat with a cavern or passage underground and is roughy funnel-shaped and tens of meters in size. Sometimes, a surface stream dissapears into a sinkhole.

POSSIBLE CAUSES OF SINKHOLE

A sinkhole can form when the ground underneath it becomes weak or dissolves, causing the surface to collapse. This can be due to factors like underground water erosion, the dissolution of soluble rock, or human activities like mining or drilling.

https://www.youtube.com/watch?v=lNavZ6tmuL0

https://www.youtube.com/watch?v=Jbh4D9o8n9c

https://youtu.be/Jbh4D9o8n9c?si=xga0uV5m0_bYD5DB

ACTUAL HISTORY FOOTAGE

EFFECTS OF SINKHOLE

 Sinkholes are dangerous because they can destroy highways and buildings. Sinkholes also can cause water quality problems. During a collapse, surface waters may leak into the aquifer, our underground source of drinking water

PICTURES

What must be the characteristics of buildings/infrastructure to avoid sinkhole?

To prevent sinkholes, buildings and infrastructure should have unique designs, reduce dissolution processes, avoid sinkhole-prone locations, and implement preventive planning to reduce vulnerability.

WHAT ARE THE MITIGATION AND PREVENTION OF SINKHOLE

​The majority of sinkhole mitigation is done by local and regional governments. This may entail ongoing ground surveys using a variety of tools, including ground penetrating radar (GPR). Water conservation regulations and drought limitations are strategies to help prevent sinkholes by maintaining high water tables.

EXPLORING EARTH'S SURFACE RUPTURE

WHAT IS SURFACE RUPTURE?

Surface rupture is the visible offset of the ground surface caused by earthquakes affecting the Earth's surface. It can cause vertical or horizontal movement and can affect large areas of land.

POSSIBLE CAUSES OF SURFACE RUPTURE

Causing ground deformations and critical damage to structures, roads, and infrastructure. It can deviate around substantial structures due to foundation strength and soil compression, but intersecting with lightweight structures often results in severe damage. Surface rupture often occurs along preexisting faults and depends on surface material and fault movement type.

​ACTUAL HISTORY FOOTAGE

https://youtu.be/hf2EY43bmD0?si=tg39PLiNHaz5al--

https://youtu.be/sfmaJTwFP24?si=owBxMqVW04fk1pF7

EFFECTS OF SURFACE RUPTURE

When the focus of the earthquake is shallow, a fault rupture may break through to the
Earth's surface, deforming the ground
and producing deep ruts, steep banks
and lateral displacements. These
ground deformations can cause critical
damage to structures, roads, subway
and buried infrastructure, such as pipelines.

PICTURES

What must be the characteristics of buildings/infrastructure to avoid surface rupture?

Specialized designs and strategies for buildings and infrastructure are needed to limit susceptibility to surface rupture, such as building structures away from active fault lines and establishing non-arbitrary setbacks.

​What are the mitigation and prevention factors of surface ruptue?

Mitigation and prevention of surface rupture in earthquake-prone areas involve building design standards, land use planning, early warning systems, seismic assessments, public education, hazard mapping, retrofitting, and insurance to reduce the impact and enhance community safety.

WHAT ARE THE MITIGATION AND PREVENTION OF SURFACE RUPTURE?

​ Surface rupture mitigation involves governmental and individual actions, including geotechnical strategies like rigid-body movement, fault diversion, and widespread fault displacement to reduce hazards.

Multiple Choice

What is a hollow or low place in the ground surface, where water dissolves and removes soil and rocks, especially limestones?

• limestones

• sinkhole

• drilling

• water erosion

Multiple Choice

A form when the ground underneath it becomes weak or dissolves

• underground water erosion

• dissolution of soluble rock

• human activities like mining or drilling.

• all of the above

Multiple Choice

which proactive measure can be employed to minimize the impact of sinkholes in a region?

• Enhancing vegetation in sinkhole-phone areas

• Implementing sinkhole risk models for identification

• Ignoring sinkhole-prone areas for development

• Impact the surrounding landscape

Multiple Choice

What are some possible cause of sinkhole?

• underground water erosion

• ancient curses

• magical soil erosion

• digging tunnel

Multiple Choice

What is the visible offset of the ground surface caused by earthquake?

• earthquake

• surface rupture

• sinkhole

• landslide

Multiple Choice

Why is surface rupture important in earthquake risk assessment and seismic zoning?

• it has no impact on earthquake risk assesment

• Surface rupture is crucial for seismic zoning

Multiple Choice

What is the effect of surface rupture?

• deforming the ground and producing deep ruts

• steep banks

• lateral displacements

• all of the above

Multiple Choice

What is caused mostly by surface rupture?

• Earthquakes

• landslide

• lateral spreading

• volcanic activity

Multiple Choice

How does earthquake surface rupture affect structures, roads, and infrastructure?

• No effect on structures and infrastructure

• Minimal damage with strong foundations

• Causes severe damage, especially to lightweight structures

• Affects areas along existing faults