2025 ACJC Prelims P2 Insert

1 © ACJC 2025 [Turn over READ THESE INSTRUCTIONS FIRST This Insert contains all the Resources referred to in the questions. This document consists of 8 printed pages. ANGLO-CHINESE JUNIOR COLLEGE JC2 Preliminary Examination Higher 2 GEOGRAPHY 9173/02 Paper 2 16 September 2025 Insert 3 hours

2 © ACJC 2025 9173/02/J2 Preliminary Examination Resource 1 for Question 1 Land use map of the area adjacent to the Sungai Mandai Besar River, showing Sites A and B and the four infiltration sites A1, A2, B1 and B2 Legend Unpaved footpath Secondary forest Swamp & mudflats Industrial land use Grass Site A Site B River mouth Channelised canal A1 A2 B2 B1

3 © ACJC 2025 9173/02/J2 Preliminary Examination [Turn over Resource 2 for Question 1 Photographs of Sites A and B Site A at the Rainbow Bridge over the Sungai Mandai Besar River Channelised canal - concrete river banks and bed Site B at the stretch of the natural course of the Sungai Mandai Besar River before the river mouth

4 © ACJC 2025 9173/02/J2 Preliminary Examination River banks and bed composed of silt and clay sediments

5 © ACJC 2025 9173/02/J2 Preliminary Examination [Turn over Resource 3 for Question 1 Infiltration rates at each of the four sites around the Sungai Mandai Besar River 0 5 10 15 20 25 30 35 40 45 50 A1 A2 B1 B2 Infilration rates (cm/hr) Land use Secondary forest Grass Industrial Swamp

6 © ACJC 2025 9173/02/J2 Preliminary Examination Resource 4 for Question 1 Findings of the investigation at Sites A and B River cross-section at Site A of the concretised Sungei Mandai Besar River Distance from left bank (metre) Sketch of river cross-section at Site B with silt and clay banks and bed Left distributary River variables (at bankfull discharge) Site A Site B River width 20 metres *78.6 metres River depth 1.52 metres *2.41 metres Cross sectional area 30.4 square metres *189.43 square metres Wetted perimeter 25 metres *113 metres Hydraulic radius 1.22 *1.68 River velocity 1.15 metres per second 0.092 metres per second *Source of Site B data: National Park (2024) Environmental Impact Assessment for the proposed Mandai Mangrove & Mudflat Nature Park. 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Depth of river (metre) 2.41 metres 78.6 metres Right distributary

7 © ACJC 2025 9173/02/J2 Preliminary