Reviewing moisture recycling dynamics: implications of land use change
on green and atmospheric water
Abstract
Green water, or plant-available soil moisture, is a substantial subset
of terrestrial fresh water. Land use change alters green water dynamics
directly, by changing soil and vegetation properties, and indirectly,
via feedbacks in the soil-vegetation-climate system. Ongoing global
deforestation, and growing interest in reforestation projects, begs the
question: Do such large-scale land use changes have major
eco-hydrological impacts via the process of terrestrial moisture
recycling (TMR)? This requires a systematic, mechanistic understanding
of green water dynamics in relation to land use change, and the
interactions with the soil-vegetation-climate system in which it is
embedded. Hence, this literature review addresses the above question via
a scoping review that draws from papers covering empirical observations
and simulated approximations on the hydrological effects of land use
change from different parts of the world. The results show that some
regions are more vulnerable to land use change than others and can
affect local as well as distant hydrology of landscapes. Furthermore, we
derive analytical tools and directions for further research that can
improve understanding of the effects of land use change on moisture
recycling dynamics in order to minimize unexpected hydrological impacts
for nature and society.