| dc.description.abstract | Deli river flows through the heart of the city of Medan, the length of the river
is about 7% km. It belongs to river region group Belawan Belumai-Ular in North
Sumatera Province, Indonesia. Local Government water board company called Perusahaan Daerah Air Minum utilizes Deli river as one of drinking water resource
for people in Medan.
The prediction of Deli river quality is necessarily important such that to manage
the river as a resource for drinking water can be carried out professionally and
continuously. Mathematical model can be used to predict changes in ambient water
quality due to changes in discharges of wastewater. This dissertation addresses
a certain from of water river quality modeling. The main objective is to obtain
simple dynamic water river quality which can be implemented in a data limited
situation and is compatible with typical complex model, so that the proposed model
can be used in integrated modeling of wastewater and river water quality in the
future.
A simplified river water quality model was formulated based on a conceptual hydraulic sub-model and simplification of an existing river water quality model. In
dynamic modeling, serially connected completely stirred tank reactor (CSTR) are
assumed to represent the behavior of a river stream. Each reactor forms a computational element and is connected sequentially to similar element upstream and
downstream. The result model was implemented to predict the quality of Deli river. Using sensitivity analysis, the result show that the model is able to be used
for predicting the Deli river water quality, particularly related to determining DO
concentration.
Linear regression was used to model the drinking water resource planning. The
model is utilized for analyzing a relationship between clean water flows with the
level consumption of water for the people of Medan, Deli River water flow and the
number of people in Medan. Basically the level of water consumption depends on
the number of people. Meaning that if the number of people increased, the level
of water consumption would increase such that it is necessarily important to plan
the drinking water availability. | en_US |
