296
E. Iwasaki et al.
satellite data will cover the shortage of meteorological stations in the Oasis
regions.
16. It is advised to apply modern irrigation methods such as pivot, sprinkler and
drip irrigation to conserve the limited groundwater and to protect the soil form
water logging and salinization. Fixing sand dunes is also necessary to protect
agricultural land and infrastructure.
17. It is necessary to establish a full database of existing wells available from irrigation directorate in Dakhla Oasis. This information will help in studying the
exact relationship between land use and water quality of the groundwater in the
study area.
18. Assessment of impacts of the ongoing land reclamation and well development is
in urgent need. It requires the study on the groundwater quality and groundwater
level on one hand, and the study of the drainage ponds that is expanding along
with the increase in groundwater withdrawal.
19. The study of the drainage ponds is also in urgent need. Drainage water cannot
be recycled, and the accumulation of drainage water in desert land will be an
obstacle to the agricultural development.
20. Further study is required to detect the actors and their behavior on the groundwater usage. Especially, the study of the farmers and enterprises that invested
on “surface springs” and “investment wells” is required to detect the ongoing
process of well development and change in land use.
21. A full database of existing wells should be available from irrigation directorate
in Dakhla Oasis. This database which includes all the available information for
each well (including depth to water and water quality) will help in studying the
exact relationship between land use and water quality of the groundwater.
22. Irrigation water is a limiting factor in the oasis region due to the shortage in water
resources. Therefore, there is a dire need to determine the adequate quantities
of crops to reach the highest levels of crop production. the most efficient way of
cultivation is to intensify the cultivation of date fruits. However, the cropping
decision should simultaneously consider the requirements for basic food for the
household and its animals.
23. Taking Rashda village as a case study, the level of agricultural output could be
increased by 79.8% and 82.5% with the current levels of inputs and given technology. More than 24% of farms could increase their production and productivity by increasing their inputs under the current crop cultivation patterns.
About 24.1% of farms could improve their efficiencies by reducing their input
use.
24. Further study is required on the farmers’ consumption behavior to determine
the cropping pattern suitable for household welfare to secure basic foods. Also,
further study is required to clarify the water quantity available according to
the type of well, and the water requirement of each crop to reach the highest
economic returns with water rationalization.
25. It is recommended to put agricultural drainage ponds in the depression under
environmental supervision, through preparation of a monitoring system to get
the most benefits from those ponds economically, as well as the protection
E. Iwasaki et al.
satellite data will cover the shortage of meteorological stations in the Oasis
regions.
16. It is advised to apply modern irrigation methods such as pivot, sprinkler and
drip irrigation to conserve the limited groundwater and to protect the soil form
water logging and salinization. Fixing sand dunes is also necessary to protect
agricultural land and infrastructure.
17. It is necessary to establish a full database of existing wells available from irrigation directorate in Dakhla Oasis. This information will help in studying the
exact relationship between land use and water quality of the groundwater in the
study area.
18. Assessment of impacts of the ongoing land reclamation and well development is
in urgent need. It requires the study on the groundwater quality and groundwater
level on one hand, and the study of the drainage ponds that is expanding along
with the increase in groundwater withdrawal.
19. The study of the drainage ponds is also in urgent need. Drainage water cannot
be recycled, and the accumulation of drainage water in desert land will be an
obstacle to the agricultural development.
20. Further study is required to detect the actors and their behavior on the groundwater usage. Especially, the study of the farmers and enterprises that invested
on “surface springs” and “investment wells” is required to detect the ongoing
process of well development and change in land use.
21. A full database of existing wells should be available from irrigation directorate
in Dakhla Oasis. This database which includes all the available information for
each well (including depth to water and water quality) will help in studying the
exact relationship between land use and water quality of the groundwater.
22. Irrigation water is a limiting factor in the oasis region due to the shortage in water
resources. Therefore, there is a dire need to determine the adequate quantities
of crops to reach the highest levels of crop production. the most efficient way of
cultivation is to intensify the cultivation of date fruits. However, the cropping
decision should simultaneously consider the requirements for basic food for the
household and its animals.
23. Taking Rashda village as a case study, the level of agricultural output could be
increased by 79.8% and 82.5% with the current levels of inputs and given technology. More than 24% of farms could increase their production and productivity by increasing their inputs under the current crop cultivation patterns.
About 24.1% of farms could improve their efficiencies by reducing their input
use.
24. Further study is required on the farmers’ consumption behavior to determine
the cropping pattern suitable for household welfare to secure basic foods. Also,
further study is required to clarify the water quantity available according to
the type of well, and the water requirement of each crop to reach the highest
economic returns with water rationalization.
25. It is recommended to put agricultural drainage ponds in the depression under
environmental supervision, through preparation of a monitoring system to get
the most benefits from those ponds economically, as well as the protection