Ecohydrology from Ancient Greek Greek lang grc , oikos , house hold lang grc , hyd r , water and lang grc , logy logia is an interdisciplinary field studying the interactions between water and ecosystems. These interactions may take place within water bodies, such as rivers and lakes, or on land, in forests, deserts, and other terrestrial ecosystems. Areas of research in ecohydrology ... affect their structure and function. Principles The principles of Ecohydrology are expressed in three ... concept in ecohydrology is that plant physiology is directly linked to water availability. Where ... of ecohydrology. Soil moisture is generally described as water content , math theta math , or saturation ... is high, and drought adapted trees in the summer, when it is low. Ecohydrology also concerns itself .... Basic equations and models Water balance at a point A fundamental equation in ecohydrology is the Hydrology ... Ecohydrology in a montane cloud forest in the National Park of Garajonay, La Gomera Canary Islands ... handle 1871 12697 Guidelines for the Integrated Management of the Watershed Phytotechnology & Ecohydrology ... No. 5. 188pp, ISBN 92 807 2059 7. Ecohydrology. A new paradigm for the sustainable use of aquatic ... No. 7. IHP V Projects 2.3 2.4, UNESCO Paris, 60 pp. Ecohydrology Darwinian Expression of Vegetation ...?isbn 0511007442 Ecohydrology why hydrologists should care , Randall J Hunt and Douglas A Wilcox, 2003, Ground Water, Vol. 41, No. 3, pg. 289. Ecohydrology A hydrologic perspective of climate soil .... 3 9. Ecohydrology of Water controlled Ecosystems Soil Moisture and Plant Dynamics , Ignacio Rodr guez Iturbe, Amilcare Porporato, 2005. ISBN 0 521 81943 1 Dryland Ecohydrology , Paolo D Odorico, Amilcare ... s perspective of ecohydrology , David D. Breshears, 2005, Bulletin of the Ecological Society of America 86 296 300. http www.cals.arizona.edu srnr research wr publications.htm Ecohydrology An International ... Ecohydrology & Hydrobiology International scientific journal on ecohydrology and aquatic ecology ISSN ... more details
Hydropedology is an emerging field formed from the intertwining branches of soil science and hydrology . Similar to hydrogeology , hydroclimatology, and ecohydrology , the emphasis is connections between hydrology and other of the earth s spheres . In this case, hydropedology focuses on the interface between the hydrosphere and the pedosphere . References http www.agiweb.org geotimes july04 high hydropedology.html Hydropedology, Geotimes soil sci stub Category Soil science ... more details
Limnological Review is an official Academic journal journal of Polish Limnological Society and publishes original papers that deal with theoretical and applied freshwater research, including such topics as limnology , ecohydrology , chemistry , physics , biology , sedymentology, hydrogeology and environmental engineering . ISSN 1642 5952 External links http www.ptlim.pl wydawnictwa.html Limnological Review official web site http www.ptlim.pl LR Instructions.pdf Instructions to Authors Category Limnology Category Earth and atmospheric sciences journals journal stub ... more details
sources date April 2010 Groundwater flow is defined as the ...part of streamflow that has infiltrated the ground, has entered the phreatic zone , and has been discharged into a stream channel , via Spring hydrosphere spring s or seep hydrology seepage water . ref Chorley, R.J., 1978. Glossary of Terms. In M.J. Kirkby Ed , Hillslope Hydrology, John Wiley and Sons, Chichester, U.K. 1 42 ref In hydrogeology it is measured by the Groundwater flow equation . See also Subsurface flow Groundwater energy balance Baseflow Ecohydrology Groundwater Hydrogeology References reflist geo term stub Category Hydrology Category Limnology Category Aquifers Category Water streams ... more details
up to 12 of them have been defined RADAMBRASIL 1982 . ref name Ecohydrology cite book author McClain, Michael E. year 2002 title The Ecohydrology of South American Rivers and Wetlands url ... are defined by their seasonal inundation and desiccation . ref name Ecohydrology They shift ... the root region. ref name Ecohydrology Soils range from high levels of sand in higher areas to higher ... m abbr on above sea level. ref name Ecohydrology Annual rainfall over the flood basin is between ... Ecohydrology In the Paraguay River portion of the Pantanal, water levels rise between two meters ... name Ecohydrology Flood waters tend to flow slowly convert 2 to 10 cm abbr on per second ref name Ecohydrology ... environs Hypoxia environmental anoxic . ref name Ecohydrology Many natural fish kill s can occur .... ref name Ecohydrology Forests usually occur at higher altitudes of the region, while grasslands ... more importantly, water stress during the dry season. ref name Ecohydrology The Pantanal ecosystem ... surfaces. ref name Ecohydrology This is characteristic of fish living in South American flood plains ... name Ecohydrology These fish have many adaptation s that allow them to survive in the oxygen depleted flood plain waters. ref name Ecohydrology In addition to the caiman, the following reptiles inhabit .... ref name Ecohydrology National and international sport fishing The Paraguay river and its tributaries are the main focus for fishing activities. ref name Ecohydrology Cattle ranching Approximately ... areas of the Pantanal which contain forest stands than lowland grassy areas. ref name Ecohydrology ... was not significantly impacted as of 2002. ref name Ecohydrology Recent high flooding has caused ... more details
nowiki nowiki In hydrology , behavioral modeling is a Scientific modelling modeling approach that focuses on the modeling of the behavior of hydrological system s. The behavioral modeling approach makes the main assumption that every system, given its environment, has a most probability probable behavior. This most probable behavior can be either determined directly based on observable system characteristics and expert knowledge or, the most frequent case, has to be inferred from the available information and a likelihood function that encodes the probability of some assumed behaviors. This modeling approach has been proposed recently by Sivapalan et al. 2006 in Drainage basin watershed hydrology. See also Ecohydrology Geomorphology Biogeomorphology Fluvial landforms of streams References Sivapalan, M., et al. 2006 , Behavioural modelling A new approach for hydrologic prediction, paper presented at the workshop http www.ito.ethz.ch conferences preferential flow Preferential flow and transport processes in soil , November 4 9, 2006, Ascona,Switzerland. Category Hydrology ... more details
otheruses Run On disambiguation In hydrology , run on refers both to the process whereby surface runoff infiltration hydrology infiltrates the ground as it flows, and to the portion of runoff that infiltrates. Run on is common in arid and semi arid areas with patchy vegetation cover and short but intense thunderstorms . In these environments, surface runoff is usually generated by a failure of rainfall to infiltrate into the ground quickly enough this runoff is termed infiltration excess overland flow . This is more likely to occur on bare soil , with low infiltration capacity . As runoff flows downslope, it may flow onto ground with higher infiltration capacity such as beneath vegetation and become run on. Run on is an important process in the hydrological and ecohydrology ecohydrological behaviour of semi arid ecosystems. Tiger bush is an example of a vegetation community that develops a patterned structure in response to, in part, the generation of runoff and run on. See also Stormwater References refbegin cite journal last1 Corradini first1 C. last2 Morbidelli first2 R. last3 Melone first3 F. year 1998 title On the interaction between infiltration and Hortonian runoff journal Journal of Hydrology publisher volume 204 issue 1 4 pages 52 67 url issn 0022 1694 doi 10.1016 S0022 1694 97 00100 5 refend ecology stub Category Hydrology ... more details
The Soil Plant Atmosphere Continuum SPAC is the pathway for water moving from soil through plant s to the atmosphere . The transport of water along this pathway occurs in components, variously defined among scientific disciplines Soil physics characterizes soil moisture water in soil in terms of water potential tension , Physiology of plants and animals characterizes water in organisms in terms of diffusion pressure deficit , and Meteorology uses vapour pressure or relative humidity to characterize atmospheric water. SPAC integrates these components and is defined as a blockquote ...concept recognising that the field with all its components soil, plant, animals and the ambient atmosphere taken together constitutes a physically integrated, dynamic system in which the various flow processes involving energy and matter occur simultaneously and independently like links in the chain. ref John R. Philip 1966 . Plant water relations some physical aspects. Annu. Rev. Plant Physiol. 17, 245 268. ref blockquote This characterises the state of water in different components of the SPAC as expressions of the energy level or water potential of each. Modelling of water transport between components relies on SPAC, as do studies of water potential gradients between segments. See also Evapotranspiration Hydraulic redistribution a parameter now being considered in the soil plant atmosphere modeling community Ecohydrology References references Category Climatology Category Ecological processes Category Hydrology Category Soil physics Category Water and the environment ar soil sci stub ... more details
Drylands are areas of land with low amounts of water in the soil . These include arid lands , where the rate of evapotranspiration exceeds the rate of precipitation meteorology precipitation and semi arid lands where precipitation is low enough that water acts as the major limiting factor in plant growth. ref cite book author Ryan, John chapter Research Centers for Dryland and Semiarid Regions editors Stewart, Bobby A. & Howell, Terry A. title Encyclopedia of water science publisher CRC Press year 2003 isbn 9780824709488 page 795 url http books.google.com books?id 5cP 81xDWuwC&pg PA795 ref Drylands occupy approximately 50 of global land area. ref name Abrahams Abrahams, A.D. and A.J. Parsons 1994. Geomorphology of deserts environments in Geomorphology of Deserts Environments edited by A.D Abrahams and A.J. Parsons, p. 1 12. Chapman & Hall, London New York. ref Drylands are complex, evolving structures whose characteristics and dynamic properties depend on many interrelated links between climate, soil, and vegetation. ref Rodr guez Iturbe, I. and A. Porporato 2004. Ecohydrology of Water Controlled Ecosystems Soil Moisture and Plant Dynamics. Cambridge University Press. ref See also Dryland farming Arid Lands Information Network Desert Desertification Wetlands References reflist ecology stub Category Biomes ... more details
unreferenced date October 2008 Subsurface flow , in hydrology , is the flow of water beneath earth s surface as part of the water cycle . In the water cycle, when Precipitation meteorology precipitation falls on the earth s land, some of the water flows on the surface forming stream s and river s. The remaining water, through Infiltration hydrology infiltration , penetrates the soil traveling underground, hydrating the vadose zone soil, Groundwater recharge recharging aquifer s, with the excess flowing in subsurface runoff. In hydrogeology it is measured by the Groundwater flow equation . Runoff Water flows from areas where the water table is higher to areas where it is lower. This flow can be either surface runoff in rivers and streams, or subsurface runoff infiltrating rocks and soil. The amount of runoff reaching surface and groundwater can vary significantly, depending on rainfall, soil moisture, Permeability earth sciences permeability , groundwater storage, evaporation, upstream use, and whether or not the ground is frozen. The movement of subsurface water is determined largely by the water gradient, type of substrate, and any barriers to flow. Surface return Bold text Subsurface water may return to the surface in groundwater flow , such as from a Spring hydrosphere spring , Seep hydrology seep , or a water well , or subsurface return to stream s, river s, and ocean s. Water returns to the land surface at a lower elevation than where infiltration occurred, under the force of gravity or gravity induced pressures. Groundwater tends to move slowly, and is replenished slowly, so it can remain in aquifers for thousands of years. Mainly, water flows through the ground which leads to the ocean where the cycle begins again. Subsurface flow Flow within the soil body may take place under unsaturated conditions, but faster subsurface flow is associated with localized soil saturation. See also Artesian aquifer Ecohydrology Groundwater Groundwater energy balance Groundwate ... more details
Image permwiltpoint.JPG thumb right A plant rooted in soil that is beyond the wilting point. Permanent wilting point PWP or wilting point WP is defined as the minimal point of soil moisture the plant requires not to wilt. If moisture decreases to this or any lower point a plant wilts and can no longer recover its turgid ity when placed in a saturated atmosphere for 12 hours. The physical definition of the wilting point symbolically expressed as sub pwp sub or sub wp sub is defined as the water content at 1500 J kg or 15 Bar unit bars of suction pressure, or negative hydraulic head . However, it is noted that the PWP values under field conditions are not constant for any given soil but are determined by the integrated effects of plant, soil, and atmospheric conditions. History The concept was introduced in the early 1910s. Lyman Briggs and Homer L. Shantz Homer LeRoy Shantz 1912 proposed the wilting coefficient, which is defined as the percentage water content of a soil when the plants growing in that soil are first reduced to a wilted condition from which they cannot recover in approximately saturated atmosphere without the addition of water to the soil Taiz and Zeige, 1991 . See pedotransfer function for wilting coefficient by Briggs. Frank Veihmeyer and Arthur Hendrickson from University of California, Davis University of California Davis found that it is a constant characteristic of the soil and is independent of environmental conditions. Lorenzo A. Richards proposed it is taken as the water content at 1500 J kg. ref cite journal author Veihmeyer, F.J. and Hendrickson, A.H. year 1928 title Soil moisture at permanent wilting of plants journal Plant Physiol. volume 3 pages 355 357 doi 10.1104 pp.3.3.355 pmid 16652577 issue 3 pmc 440017 ref See also Available water capacity Ecohydrology Field capacity Moisture equivalent Moisture stress Nonlimiting water range Soil plant atmosphere continuum References references Taiz, L. and E. Zeiger. 1991. Plant Physiology. T ... more details
BLP sources date May 2011 Robert J. Naiman born 31 July 1947 is a professor in both the School of Aquatic and Fishery Sciences and the College of Forest Resources at the University of Washington in Seattle. He also holds the UNESCO Chair in Sustainable Rivers at the University of Washington. Dr. Naiman is best known for his work on the ecology of rivers and riparian areas. ref name Naiman1993 cite journal last Naiman first Robert J. coauthors Henri Decamps, Michael Pollock year 1993 title The Role of Riparian Corridors in Maintaining Regional Biodiversity journal Ecological Applications volume 3 issue 2 page 209 issn 10510761 doi 10.2307 1941822 ref His work to understand the biogeochemical cycling and role of animals in altering river and riparian systems have been particularly influential. Dr. Naiman started researching the Queets River in Washington U.S. state Washington State in 1992 and has since been nicknamed Dr. Queets by the Seattle press from his continuing research on that river. Education Bachelor of Science , Zoology, 1969, California State Polytechnic University br Master of Arts, Zoology and Ichthyology, 1971, University of California , Los Angeles br Doctor of Philosophy, Zoology and Ecosystem Science, 1974, Arizona State University br Honorary Doctor of Philosophy, Universit Paul Sabatier Toulouse, France Key Appointments UNESCO Chair in Sustainable Rivers br Coastal Rivers Research Consortium CRRC br Chair, Organizing Committee DIVERSITAS International Paris, France br Chair, FreshwaterBIODIVERSITY Member, Scientific Advisory Committee Member, U.S. National Committee UNESCO International Hydrology Programme Paris Paris, France br Chair, IHP MAB Ecohydrology Programme Robert W. Woodruff Foundation J.W. Jones Ecological Research Center br Scientific Advisor Global Water System Project GWSP Bonn Bonn, Germany br Member, Executive Committee Member, Scientific Advisory Committee References Reflist Persondata Metadata see Wikipedia Persondata . NAME Nai ... more details
Multiple issues cleanup December 2009 intro length December 2009 Outwelling is a hypothesized process by which coastal salt marsh es and mangroves, hot spots of production, produce an excess amount of carbon each year and outwell these organic nutrients and detritus into the surrounding coastal Headlands and bays embayment or ocean , thus increasing the productivity of local Fishery fisheries or other coastal plants. Outwelling also nourishes plankton communities and causes a spike in activity. ref Wolanski, E. 2007. Estuarine Ecohydrology. Elsevier B.V., Amsterdam, The Netherlands. ref The majority of outwelling is dissolved organic carbon DOC and some particulate organic carbon POC ref Alongi, D. 1998. Coastal ecosystem processes. CRC Press LLC. Boca Raton, Florida. USA. ref Outwelling expels salt 90 g salt m2 , silicate 1.0 mmol m2 , orthophosphate 0.03 mmol m2 , and nitrate 0.04 mmol m2 during each Tide tidal cycle . ref Ridd, P., M. Sandstrom, E. Wolanski. 1988. Outwelling from tropical tidal salt flats. Estuarine, Coastal, and Shelf Science, Vol. 26. pp. 243 253. ref Outwelling is affected by a number of different factors. For one, the amount of outwelling is dependent upon the primary production of an estuary , thus, highly productive salt marshes result in increased outwelling. It is also dependent on tidal amplitude and geomorphology of the estuary. Outwelling is not a steady process, and is affected by large rain falls or inundation events the larger the inundation, the greater the outwelling . ref Odum, E.P. 2002. Tidal marshes as outwelling pulsing systems. in Concepts and controversies in tidal marsh ecology. Weinstein, M.P, and D.A. Kreeger, eds. Kluwer Academic Publishers, New York, NY. USA ref Outwelling does not occur in every estuary. It is more evident and occurs more in estuaries bordering extensive coastal marshes. For example, a study done in a New England salt marsh found no evidence of outwelling, and in fact found that the sal ... more details
Multiple issues cleanup March 2009 peacock March 2009 like resume March 2009 Image Shahbaz Khan.jpg thumb 250px right Shahbaz Khan Shahbaz Khan b. in Jhelum Pakistan is an Australian climatology climatologist and hydrology hydrologist . He is currently Chief of Section on Sustainable Water Resources Development and Management. His work at UNESCO includes the Water Education for Sustainable Development, Hydrology for Environment, Life and Policy HELP http www.unesco.org water ihp help , Ecohydrology, Water and Ethics, Energy and Food Nexus within the International Hydrological Programme IHP . He advises UN member states on environmental policies, review of curricula, and securing multilateral support for research and education projects especially in the Asia Pacific and African regions. Work Khan has been a proponent and champion of a range of innovative water management programs by working closely with the Australian government e.g. Australian Prime Minister s 2007, 10 billion, 10 point, 10 year rural water security plan. He has played a vital role in bringing together multidisciplinary research programs e.g., a new program aimed at combining irrigation, other competing uses and the environment together System HarmonisationTM Program http www.irrigationfutures.org.au programs.asp?ID 6 under the Australian Cooperative Research Centres initiative. This program brings together key researchers from 15 advanced research partners across Australia. Khan was previously Professor of Hydrology and Director of International Centre of Water at the Charles Sturt University Australia and Research Leader Director of Irrigated Systems and Rural Water Use areas of CSIRO Australia http news.csu.edu.au director features.cfm?itemID F2CB4A69BECEE004C2CA3D6D494D7496&printtemplate release . He was also part of the team who developed 1st computer based early warning system for floods in Pakistan known as Flood Early Warning System FEWS http www.ffc.gov.pk achievements.aspx . Achievements K ... more details
and fishes within channelized headwater streams in the Midwestern United States. Ecohydrology 2 ... in the Midwestern United States. Ecohydrology 2 294 302. ref Although there are broad management plans ... in the Midwestern United States. Ecohydrology 2 294 302. Carlson, R.L and G.V. Lauder. 2010. Living ... more details
The following outline is provided as an overview of and topical guide to hydrology Hydrology &ndash study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle , water resources and environmental watershed sustainability. Essence of hydrology Main article Hydrology Water Hydrologic cycle Cryosphere Branches of hydrology Hydrometry &ndash the measurement of the different components of the hydrologic cycle Chemical hydrology &ndash the study of the chemical characteristics of water Ecohydrology &ndash the study of interactions between organisms and the hydrologic cycle Hydrogeology &ndash the study of the presence and movement of water in aquifers Hydroinformatics &ndash the adaptation of information technology to hydrology and water resources applications Hydrometeorology &ndash the study of the transfer of water and energy between land and water body surfaces and the lower atmosphere Isotope hydrology &ndash the study of the isotopic signatures of water Surface water hydrology Surface hydrology &ndash the study of hydrologic processes that operate at or near the Earth s surface Catchment hydrology &ndash study of the governing processes in a given hydrologically defined Drainage basin catchment History of hydrology Main article History of hydrology Water movement pathways Above ground Evaporation &ndash Pan evaporation &ndash Interception water Interception &ndash Evapotranspiration &ndash Stemflow &ndash Throughfall &ndash On ground Surface runoff &ndash Overland flow &ndash Horton overland flow &ndash Below ground Infiltration hydrology Infiltration &ndash Pipeflow &ndash Baseflow &ndash Subsurface flow &ndash see Hydrological phenomenon Measurement tools Groundwater ref name Western Cite book last Western first Andrew W. contribution Principles of Hydrological Measurements year 2005 title Encyclopedia of Hydrological Sciences editor last Anderson editor first Malcolm G. volume 1 pages 75 94 place West Susse ... more details
Estuarine water circulation is controlled by the inflow of rivers , the tides , rainfall and evaporation , the wind , and other oceanic events such as an upwelling , an Eddy fluid dynamics eddy , and storms . Water circulation patterns are influenced by vertical mixing and Stratification water stratification , and can affect residence time and exposure time. Residence time Stack File EstauryModel.JPG thumb right Model of Estuary The residence time of water is a key variable determining the health of an estuary , particularly from human induced stresses. Rapid flushing ensures that there is insufficient time for sediment accumulation or dissolved oxygen depletion in the estuary thus a well flushed estuary is intrinsically more robust than a poorly flushed estuary. ref name Wolanski Wolanski, E. 2007 Estuarine Ecohydrology. Amsterdam, The Netherlands Elsevier. ISBN 978 0 444 53066 0 ref Residence time also affects other parameters such as heavy metals , Dissolution chemistry dissolved nutrients, suspended particulate matter , and algal blooms that may affect the health of estuaries. ref name Balls Balls, B.W. 1994 Nutrient inputs to estuaries from nine Scottish East Coast Rivers influence of estuarine processes on inputs to the North Sea. Estuarine, Coastal, and Shelf Science, 39, 329 352. ref A simple way to calculate residence time is using a simple classic estuary model, which can be useful for acquiring a conceptual understanding of an estuary, but is coarse in time and space. A classic estuary has the following components 1 freshwater inflow with a discharge Q sub f sub and a salinity S sub f sub generally S sub f sub 0 2 oceanic inflow with a discharge Q sub in sub and salinity S sub o sub and 3 outflow to the ocean with a discharge of Q sub out sub and a salinity S sub 1 sub . The inflow and outflow of water is equal because mass is conserved. Salt is also a conserved, therefore, the inflow and outflow fluxes of salinity are also equal. If groundwater inputs an ... more details
Encyclopedia
top
