Environmental Carrying Capacity Analysis Based on Water Resources (Case Study of East Surabaya Area)

East Surabaya, an area that is developing intensively, is known for its excessive problems, including a water shortage which reoccurs every year. The main objective of this study is to investigate the environmental carrying capacity based on the available water resources in East Surabaya, Indonesia. The method used consists of determining the ratio between supply and demand in order to obtain the carrying capacity of the local environment. The results show that the carrying capacity in East Surabaya in the year 2030 is of conditional sustain and amounts to 1.0. Generally, the deficit status (overshoot) occurs between May and November and conditional sustain in April and December, with the condition of surplus (sustain) occurring from January to March. However, further action is needed to conserve water during the surplus months and thus meet the needs arising during the deficit months.