The Hula wetland and old Lake Hula drainage were completed in 1957, and the land was converted into agricultural use. However, the adoption of inappropriate irrigation methods led to several critical concerns, including the oxidation of organic matter, frequent outbreaks of subsurface unsecured fire, soil surface subsidence and disruption of the hydrological system. Additionally, nitrogen mineralization created an accumulation of nitrate loads, which increased the risk of leaching into Lake Kinneret and deteriorating its water quality. The natural intrusion of gypsum into peat soil’s organic matter has contributed to increased levels of sulfate and calcium, enhancing soil salinization. Consequently, a reclamation project was implemented, the Hula Project (HP). The dependence of climate conditions and consequently soil moisture on Alkalinity (ALK), Total Dissolved Solids (TDS) and Sulfate (SO4) concentrations, Electrical Conductivity (EC), and pH properties within the Peat soil drained waters composition was documented. A temporal decline of ALk, TDS, SO4, EC, and, to a lesser extent, pH measures during 1994-2010 and an increase later were indicated. The nutrient migration dynamic is evaluated through spatial and temporal dimensions to confirm the dominant effect of soil wettability with negligible fluctuation of the pH values.
References
[1]
American Public Health Association, American Water Works Association, Water Environmental Federation (2023) Standard Methods for the Examination of Water and Wastewater. 24th Edition, APHA Press.
[2]
HPDB (1994-2019) Hula Project Data Base. MIGAL-Galilee Scientific Research Institute.
[3]
Gophen, M. and Levanon, D. (1994-2006) Hula Project, Annual Reports. MIGAL-Scientific Research Institute, Jewish National Fund (Keren Kayemet LeIsrael), US Forestry Service International Project, Israeli Water Authority. (In Hebrew)
[4]
Gonen, E. (2007) Hula Project Annual Report. Jewish National Fund (Keren Kayemet LeIsrael) MIGAL-Scientific Research Institute and Israeli Water Authority, 133 p. (In Hebrew)
[5]
Barnea, I. (2008) Hula Project Annual Report. Jewish National Fund (Keren Kayemet LeIsrael) MIGAL-Scientific Research Institute and Israeli Water Authority, 159 p. (In Hebrew)
[6]
Barnea, I. and Kaplan, D. (2008-2018) Hula Project Annual Report. Jewish National Fund (Keren Kayemet LeIsrael) MIGAL-Scientific Research Institute and Israeli Water Authority, 232 p. (In Hebrew)
[7]
Perlson, O., Klein, D. and Kaplan, D. (2021) Hula Project Annual Report. Jewish National Fund (Keren Kayemet LeIsrael), MIGAL-Scientific Research Institute and Israeli Water Authority, 127 p. (In Hebrew)
[8]
Hollis, G.E. (1990) Environmental Impacts of Development on Wetlands in Arid and Semi-Arid Lands. Hydrological Sciences Journal, 35, 411-428. https://doi.org/10.1080/02626669009492443
[9]
Kracauer Hartig, E., Grozev, O. and Rosenzweig, C. (1997) Climate Change, Agriculture and Wetland in Eastern Europe: Vulnerability, Adaptation and Policy. Climatic Change, 36, 107-121. https://doi.org/10.1023/a:1005304816660
[10]
Snyder, G.H., Deren, C.W. and Glaz, B. (1999) Wetland Crops versus Wetland Drainage. HortScience, 34, 46-49. https://doi.org/10.21273/hortsci.34.1.46
[11]
AMI (Agriculture Ministry, Israel) (1986) Hula Valley: Soil Survey, Final Report. Agriculture Ministry, Water Commission, Department of Soil Conservation and Drainage, 45 p.
[12]
Barnea, I. (2009) Reexamination of Phosphorus Practices in the Altered Wetlands Soils of Hula Valley, Israel. MSc Thesis, Faculty of Agriculture, Food and Environmental Quality, The Hebrew University, 104 p. (In Hebrew, English Abstract)
[13]
Howarth, R.W. and Cole, J.J. (1985) Molybdenum Availability, Nitrogen Limitation, and Phytoplankton Growth in Natural Waters. Science, 229, 653-655. https://doi.org/10.1126/science.229.4714.653
[14]
Marino, R. and Howarth, R.W. (2016) Why Is Planktonic Nitrogen Fixation So Rare in Coastal Marine Ecosystems? Insights from a Cross-Systems Approach. In: Gilbert, P. and Kana, T., Eds., Aquatic Microbial Ecology and Biogeochemistry: A Dual Perspective, Springer International Publishing, 127-139. https://doi.org/10.1007/978-3-319-30259-1_11
[15]
Gophen, M. and Levin-Orlov, V. (2022) Sulfate (SO2− 4) Decline Supported Lake Kinneret (Israel) Invasion of N2-Fixing Cyanobacterium Aphanizomenonovalisporum. Hydrobiology, 1, 146-163. https://doi.org/10.3390/hydrobiology1020012
[16]
Gophen, M. (2022) Lake Kinneret (Israel) Invasion by N2-Fixer Cyanobacterium Was Enhanced Simultaneously by Nitrogen Deficiency, Phosphorus Sufficiency, and Sulfate Decline. Modern Approaches in Oceanography and Petrochemical Sciences, 3, 278-282.
[17]
Pecharova, E., Hezina, T., Prochazka, J., Prikryl, I. and Pokorny, J. (2001) Restoration of Spoil Heaps in Northwestern Bohemia Using Wetlands. In: Vymazal, J., Ed., Transformations of Nutrients in Nature and Constructed Wetlands, Buckhus Publishers, 129-142.
[18]
Markel, D., Sass, E., Lazar, B. and Bein, A. (1997) Iron and Sulfur Interactions in Anaerobic Sediments: Toxicity to Macrophytic Vegetation in the Newly Created Agmon Wetland, Northern Israel. Proceedings 4th International Conference Biogeochemistry of Trace Elements, Berkeley, 23-26 June 1997, 5270.
[19]
Reddy, K.R., White, J.R., Wright, A. and Chua, Y. (1999) Influence of Phosphorus Loading on Microbial Processes in the Soil and Water Column of Wetlands. In: Ready, K.R., O’Connor, G.A. and Schelske, C.L., Eds., Phosphorus Biogeochemistry in Subtropical Ecosystems, CRC Press, 249-271.
[20]
Hambright, K.D., Bar-Ilan, I. and Eckert, W. (1998) General Water Chemistry and Quality in a Newly-Created Subtropical Wetland Lake. Wetlands Ecology and Management, 6, 121-132. https://doi.org/10.1023/a:1008484506420
