Agriculture & watershed Management

Preserving the world second largest hyper saline lake under future irrigation and climate change

Preserving the world second largest hyper saline lake under future irrigation and climate change

Iran Urmia Lake, the world second largest hyper saline lake, has been largely desiccated over the last two decades resulting in socio-environmental consequences similar or even larger than the Aral Sea disaster.

Investigating the salinization and freshening processes of coastal groundwater resources in Urmia aquifer, NW Iran

Investigating the salinization and freshening processes of coastal groundwater resources in Urmia aquifer, NW Iran

This paper presents the results of an assessment about interaction between Urmia Lake (UL) and coastal groundwater in the Urmia aquifer (UA). This aquifer is the most significant contributor to the freshwater supply of the coastal areas. The use of hydro chemical facies can be very useful to identify the saltwater encroachment or freshening phases in the coastal aquifers.

Plant growth under high salinity

Plant growth under high salinity

Plants most suitable for growing under high saline or even seawater conditions are the ones naturally living under high saline circumstances. Clear examples of valuable crops to be grown under saline circumstances or in combination with aquaculture are given by Brown et al. (1999)1 and Kempenaer et al. (2007)2. Next to this group, a series of tolerant or moderate salt tolerant plants are experimentally tested and described in literature. For many species of this group a threshold value has also been described.

Potato production systems in different agro ecological regions and their relation with climate change

Potato production systems in different agro ecological regions and their relation with climate change

This document provides background on potato production systems, starting with a scoping of global production systems and tries to identify key issues for policy and research. It is meant as a starting point for discussion and collaboration on GRA relevant topics. The outcome of this process will be used to create regional or global networks on the identified topics.

Greet Blom-Zandstra & Jan Verhagen

2015

A space borne multi-sensor approach to monitor the desiccation of Lake Urmia in Iran

A space borne multi-sensor approach to monitor the desiccation of Lake Urmia in Iran

The use of GRACE gravity data makes it possible to determine continental water storage changes and to assess the water budget on monthly to multi-annual time scales. We use satellite altimetry data from ENVISAT and CryoSat-2 to monitor the lake water level.

Extended fuzzy analytic hierarchy process approach in water and environmental management (case study: Lake Urmia Basin, Iran)

fuzzy analytic hierarchy process approach, Urmia Lake, water and environmental management

The present research phases included: (1) determining the effective internal and external factors along with formulating strategic alternatives for reviving the lake’s water resources via strength–weakness–opportunity– threat (SWOT–TOWS) matrix; (2) prioritizing the alternatives according to sustainable development criteria via extended fuzzy analytic hierarchy process (FAHP) technique, and (3) applying sensitivity analysis to monitor the robustness of the ranking.

Salinity gradient energy potential at the hyper saline Urmia Lake e ZarrinehRud River system in Iran

Salinity gradient energy potential at the hyper saline Urmia Lake e ZarrinehRud River system in Iran

Salinity gradient has globally high potential for electric energy production, especially where low salinity rivers discharge into hyper-saline lakes. Based on thermodynamic calculations and on field data, the theoretical potential of energy production at the above system has been calculated between 400 and 1000 MW, while the technical potential is expected between 40 and 50% of that. Two processes for the production of electricity from salinity gradients were investigated: PRO and RED.

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