Senior Secondary (S4-S6)

Photo of Stream Ecosystem




Hok Tau, Pat Sin Leng Country Park

Maximum number of Participants:



Learning objectives:

This programme aims to facilitate students’ learning in areas of knowledge, skills and attitudes. In terms of knowledge, students will understand the functions of streams, such as energy flow, the carbon cycle and the nitrogen cycle. They will study the food chain and feeding relationship in local streams, human impact on the environment, particularly water pollution. During the field trip, students will use and compare various aquatic ecosystem health indicators in measuring water quality in the selected local stream. In terms of skills, through group activities and scientific investigation in the field, students will develop generic skills such as communication skills, creativity, critical thinking skills and problem-solving skills (3Cs+1P), and scientific inquiry skills. Inquiry in nature helps build on students’ prior knowledge and experiences and offers an opportunity for them to engage in self-directed learning. In terms of attitude, students will develop an awareness of the fragility and importance of freshwater streams. It helps cultivate a pro-environmental attitude of conserving and caring for nature, as well as a responsibility for conservation.

Relevance to curriculum:

In accordance with the Biology Curriculum and Assessment Guide (Secondary 4 - 6) (2007 & 2015)
Related Chapters: Biology: Organisms and Environment (Compulsory part) and Applied Ecology (Elective part)

Type of field activity:

Scientific Inquiry: Water quality investigation (Using Physico-chemical Indicators) , Exploring Biotic Community in the Local Stream

During the field trip, students will use different indicators, such as temperature, pH value, DO level, salinity, to make accurate measurements and determine the water quality. Meanwhile, they will explore the biotic community in the local stream and identify common freshwater species. In addition, students will use a quadrat to conduct biological surveys, especially on fast-moving organisms, to understand the relationships between different abiotic and biotic factors. They can appreciate the rich biodiversity of the local stream ecosystem and recognise the need and their responsibility for stream conservation. 

Photo of Stream Ecosystem

Photo of Stream Ecosystem

Event calendar:

Monday to Friday* (excluding Saturdays, Sundays, and public holidays)

Morning (9:00 am to 12:00 pm) or afternoon (2:00 pm to 5:00 pm)

Applications are only accepted from 6 months to 2 weeks before the date of the event.

How to Enroll:

Please fill in the Application Form (Limited quota will be allocated on a first-come- first-served basis)


Chinese/ English

Demonstration Video:

Water quality investigation: Physico-chemical Indicators


Water quality investigation: Biological Indicators


Species Identification Guide FieldBook(Teacher) Handbook(Student)



Species Identification Guide





Please contact Tai Mo Shan Country Park Visitor Centre on Monday, Wednesday to Sunday and Public Holidays 9:30 a.m. - 4:30 p.m (except the first two days of the Chinese New Year) at 2498 9326 or email to

Application/ Reservation