Environmental Systems Modeling EENV 5326 GIS for Environmental Engineering

Neighbourhood functions To perform neighbourhood analysis, we must: 1.state which target locations are of interest to us, and what is their spatial extent, 2.define how to determine the neighbourhood for each target, 3.define which characteristic(s) must be computed for each neighbourhood.

Neighbourhood functions Proximity computation: 1.Buffer zone generation 2.Thiessen polygon generation

Table 12.3 Computing water use based on land-use area Node Total Node Area (ha) Land Use Type Land Use Area (ha) Unit Demand (l/day/ha ) Demand (l/day) Node Total (l/day) J-16.88Industrial6.8811,20077,100 J Industrial Commercial Residential ,200 4,700 7,500 15,500 4,300 40,400 60,200 J Commercial Residential Undeveloped ,700 7, ,100 38, ,800 J Industrial Commercial Residential Undeveloped ,200 4,700 7, , , ,800 J Industrial Commercial ,200 4,700 72,500 7,600 80,100 J Industrial Commercial Residential ,200 4,700 7,500 2,200 6,400 24,800 33,400