Introduction
Wastewater irrigation has recently emerged as a focus
of study in the developing world. Faced with increasing
water shortages and a lack of wastewater treatment plants,
farmers are turning to wastewater as a reliable source
of irrigation. In arid regions, wastewater is especially
valued for its reliable supply (Van der Hoek et al. 2002).
In humid regions, the use of wastewater in agriculture
is largely the result of the unplanned pollution of irrigation
sources with wastewater (Rashid-Sally et al. 2002).
The subject of wastewater irrigation has never been investigated
in the monsoon climate of Nepal. The Kathmandu Valley is
a burgeoning metropolitan area surrounded by agricultural
lands. The lack of adequate wastewater facilities and lack
of rainfall during the dry season, as well as other factors,
have led to the use of wastewater in agriculture in the
Kathmandu Valley. The goal of this study was to investigate
areas of wastewater irrigation and determine wastewater
irrigation practices.
