User:Hami-gottingen/sandbox

- The concept of evapotranspiration in heterogeneous urban green spaces

A conventional approach for measuring plant water requirements is used in many agricultural systems as there is a uniformity of crop species and height. However, this approach is still not without its challenges.The estimation of plant water requirements in the case of non-agricultural systems like urban parks, forests and riparian systems needs to consider the heterogeneity of plants, soils, water and climate characteristics. These inherent attributes together with the high spatial and temporal variability of urban landscapes lead to complexity in surface energy and aerodynamic processes, which are the fundamental parameters in evapotranspiration (ET) estimation. ET, which is the main component of plant water demand, is the sum of evaporation and plant transpiration.

Estimating ET and subsequently plant water requirements in urban environments is made more complex due to the wide variation of vegetation types involved, including trees, shrubs and turf grasses, with different species, vigour, density, height, microclimate, water demand and water accessibility &