1. How do the Following factors Influence Water Supply
Climate
2. River Systems
3. Geology

2. Learning Objectives
To understand how these physical factors can influence water supplies in the case studies of India and California

3. Water Supply In India Low Pressure due to the position of the ITCZ
Monsoon Climate
Due to the movement of the ITCZ
Little supply Dec – May
Monsoon June - Oct
High pressure due to descending air
Brahmaputra
Ganges
Indus
2. Changing Discharge in the Ganges, Indus and Brahmaputra.
This varies seasonally due to the Monsoon and snow melting in the Himalayas
3. Geology
Aquifers in the North = good water supply
Low Pressure due to the position of the ITCZ

4. California
P. 54
Examine the information on this page and make notes on the Physical factors which can influence water supply here. Cover :
Climate and relief – include relief rainfall ( area which benefit and suffer due to this), Sierra Nevada mountains and the deserts e.g Death Valley and Mojave desert. Mention how surface runoff can vary due to the relief and so influence water levels.
Weather systems which affect California – high pressure and El Nino
How and why river discharge here varies – include the Scramento river, the San Joaquin river, times of the year when the discharge varies
How the Geology varies in the region and the impact this has on aquifer levels