Water demand by private households and the public sector

Abstract

In this section, the shallow (statistical) Household model is described and results from runs are presented. In later stages of the development of DANUBIA, this model was replaced by the DeepHousehold actor model. The shallow model calculates the water demand by private households and the public service sector. The calculation of water demand is based on 25 categories of households. The household types are distinguished by the number of persons living in the household as well as their monthly net incomes in a 5 × 5 matrix. Data stem from representative written and telephone surveys of a total of 1,317 people within the German population of the Upper Danube catchment. The computations include the domestic water demand per household type based on the ten types of use (e.g. showers, toilets, tooth brushing etc.) taking into account annual variations, the water price and price elasticity and the aggregation of water demands by household types for the individual proxels taking into account an urban-rural bias factor and an innovation factor. The latter two were necessary to account for considerable deviations on a spatial level and over time.