Modelos Hidrologicos: Runoff

Pedro Ribeiro de AndradeGilberto Camara

How can geospatial data feed CA models?

Grid of cells Neighbourhood Finite set of discrete states Finite set of transition rules Initial state Discrete time

Brazil 2000 Espinhaço Range

Minas Gerais State 2000

View

Pico do Itacolomido Itambé

Serra do Lobo

Pico do Itacolomido Itambé

Serra do Lobo

9 km

9 km

rainrain rain

N

Pico do Itacolomi do Itambé

Serra do Lobo

A very simple runoff model

Grid of cells Neighbourhood Finite set of discrete states Finite set of transition rules Initial state Discrete time

Acessing a cell space in a database

host = "gis-bigdata.uni-muenster.de”user = "terraview", password = "terralib”database = “cabeca”

cells = CellularSpace { dbType = "mysql", host = "gis-bigdata.uni-muenster.de",

database = "cabeca", user = "terraview", password = "terralib", theme = "cells90x90", select = {"height_ as height",

"soilWater"}, autoload = true}

Grid of Cells – Height

Initial state – Rain in the heighest cells

1000mm of rain in the cells above 200m height

Neighborhood – based on height

48 34

30

21

37

33

34

25

23

Neighborhood – based on height

48 34

30

21

37

33

34

25

23

Note that the process takes place in parallel in space

States and transitions

Dry Wet

What is the behavior of each state? Are both states necessary?

Relaxing cellular automata definitions

Questions

How to verify whether the model is correctly implemented?

What are the limitations of this model?