During recent years, Israel's water crisis has been gradually worsening. There are several reasons for the water shortage: Israel is a semi-arid region with few sources of water; the population is growing rapidly; the standard of living with its accompanying consumption of water per capita is rising; and there have been several consecutive years of drought.
Israel has three main water sources: Lake Kinneret, the Mountain Aquifer and the Coastal Aquifer. The country also has KKL-JNF, which has increased Israel's water economy to such an extent that it has been dubbed "Israel's fourth aquifer".
KKL-JNF's first effort to meet the challenge of Israel's water crisis was by building water reservoirs. To date, with the help of its friends throughout the world, KKL-JNF has built over 240 reservoirs for recycled water and floodwater at both local and regional levels. The recycled water reservoirs are actually the final stage in a complex process for purifying sewage that includes breakdown of organic pollutants, removing suspended particles by sedimentation and then storing the recycled water in reservoirs from where it can be piped out for use in irrigation. In 2011, the water in reservoirs built by KKL-JNF provided about half of the water consumed by Israeli agriculture, freeing up precious freshwater for domestic uses.
Reservoir technology has improved, becoming incomparably more effective and sophisticated over the years as a result of the accompanying research and development, as well as the lessons learned by KKL-JNF from actual experience in building reservoirs in past decades. This includes implementing sealing technology using plastic sheets, reservoir engineering, preventing embankments from collapsing, improvements in maintenance and access, extending previously existing reservoirs, and hydraulic control.
In 1984, KKL-JNF made a strategic decision to get involved in river restoration. This decision becomes especially significant when one realizes that Israel's Ministry of the Environment was only established in 1988. Since then, KKL-JNF has taken responsibility for rehabilitating polluted rivers and their surroundings. This includes pollutants removal, scenic restoration, soil conservation, landscaping, developing parks, blazing trails and supporting research on how to restore the polluted ecosystems around the streams. The evidence of KKL-JNF’s activities can be seen in many streams and rivers such as the Alexander River – Italy Park, Kishon River, Harod River and the Besor River.
Different times bring different challenges. Today, KKL-JNF stays at the cutting edge of water conservation in Israel by thinking out of the box, pioneering water technologies that have a potential for positively impacting Israel's water economy and being implemented in other water-scarce regions around the world. One example of this is the biofilter, an innovative project in which urban runoff is purified so that it can be used to refresh depleted aquifers. The biofilter uses several purifying layers of vegetation and bacteria to purify rainwater, which contains high levels of metals and other toxic materials. Yaron Zinger, who manages the project, is convinced that within a few years, the biofilter can replenish Israel’s coastal aquifer, most of which has become so polluted in recent years that the water is unfit for consumption.