1 introduction to hydrology
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What I tells to my student introducing to them Hydrology
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- 1. An Introduction to Hydrology Susan Derges - Water
hydrological Cycle Riccardo RigonMonday, March 11, 13
- 2. It begins with a storm They were rolls, waves that finished
in a puff: known noises, village things. Everything that we have
here is animated, lively, maybe because the distances are short and
fixed as in a theatre. The downpours were onto the courtyards here
around, the thunder up here above the roofs; I could recognize by
ear, a little further up, the place of the usual God that made
storms when we were children, He too a village character. Here all
is as if intensified, a matter of scale probably, of inner
relationships. The shape of the noises and of these thoughts (which
were, after all, the same thing) seemed to me for a moment truer
than true, but it cannot be recreated with words. Luigi Meneghello
- Incipit of Libera Nos A Malo 2R. RigonMonday, March 11, 13
- 3. Introduction to Hydrology Objectives 3R. RigonMonday, March
11, 13
- 4. Introduction to Hydrology Objectives To explain what
hydrology is and what it deals with: 3R. RigonMonday, March 11,
13
- 5. Introduction to Hydrology Objectives To explain what
hydrology is and what it deals with: The elements of the water
cycle 3R. RigonMonday, March 11, 13
- 6. Introduction to Hydrology Objectives To explain what
hydrology is and what it deals with: The elements of the water
cycle The spatial and temporal scales involved 3R. RigonMonday,
March 11, 13
- 7. Introduction to Hydrology Objectives To explain what
hydrology is and what it deals with: The elements of the water
cycle The spatial and temporal scales involved The mass and energy
balance at a global scale 3R. RigonMonday, March 11, 13
- 8. Introduction to Hydrology Objectives To explain what
hydrology is and what it deals with: The elements of the water
cycle The spatial and temporal scales involved The mass and energy
balance at a global scale The Budyko Curve 3R. RigonMonday, March
11, 13
- 9. Introduction to Hydrology The Water Cycle The water on Earth
flows from the atmosphere to the ground. And then from the rivers
to the sea, from where it returns to the atmosphere: Hydrology is
the science that studies these flows, which make up the water
cycle. 4R. RigonMonday, March 11, 13
- 10. Introduction to Hydrology The Water Cycle The flows from
the atmosphere to the surface of the Earth are called
precipitations. The water that reaches the ground can infiltrate
and flow within the soil or it can run off on the surface (these
are referred to as horizontal flows). At the same time, there is
evaporation from the soil and water surfaces, and transpiration
from plants and animals (in a word, evapotranspiration).
Infiltration and evaporation constitute the vertical flows. 5R.
RigonMonday, March 11, 13
- 11. Introduction to Hydrology From where the Earth water
arrives ? During the first seconds after the Big Bang, hydrogen and
Helium were created. Accordingly to the actual cosmogenetic
theories oxygen was formed a little later. However, it is the third
element more diffuse in the universe. Ball, P., 1999 6R.
RigonMonday, March 11, 13
- 12. Introduction to Hydrology From where the Earth water
arrives ? If you consider that Helium is very much not reactive
could not not a real surprise that an element built on Hydrogen and
Oxygen is abundant on the Earth. Ball, P., 1999 7R. RigonMonday,
March 11, 13
- 13. How much ? Distribution of Water on Earth Saline
groundwater & lakes Fresh Oceans 3% 2% 95% 8K. CaylorMonday,
March 11, 13
- 14. How much ? Distribution of Water on Earth Ice & Snow
Saline groundwater & lakes Groundwater Fresh Surface Water
Oceans 3% 2% 30% 70% 95% 0.34% 9K. CaylorMonday, March 11, 13
- 15. How much ? Distribution of Water on Earth Ice & Snow
Saline groundwater & lakes Groundwater Fresh Surface Water
Oceans 3% 2% Surface water 30% is only 0.34% of all fresh 70% 95%
water 0.34% 10K. CaylorMonday, March 11, 13
- 16. How much ? Distribution of Water on Earth Ice & Snow
Soil Saline groundwater & lakes Groundwater Fresh Surface Water
moisture Oceans 3% Ice 14% 2% & Snow 30% Lakes, 70% 95%
Wetlands, & Rivers 86% 0.34% 11K. CaylorMonday, March 11,
13
- 17. How much ? Distribution of Water on Earth Ice & Snow
Soil Saline groundwater & lakes Groundwater Fresh Surface Water
moisture Oceans 3% Ice 14% 2% & Snow 30% Lakes, 70% 95%
Wetlands, & Rivers 86% 0.34% Soil moisture is 0.001% of all
water. Provides for all agricultural food production and sustains
all terrestrial ecosystems 12K. CaylorMonday, March 11, 13
- 18. How much ? The Water Cycle Collocation Area covered Volume
% % of fresh [106 km2 ] [106 km3 ] water Oceans 361.300 1.338 96.5
- Groundwater 134.8 23.4 1.7 - Fresh grundwater 10.530 0.76 30.1
Soil humidity 82 0.0165 0.001 0.05 Perennial ice and snow 16.2275
24.0641 1.74 68.7 Antarctic 13.980 21.600 1.56 61.7 Greenland
1.8024 2.340 0.17 6.68 Arctic islands 0.2261 0.0835 0.006 0.24
Mountain areas 0.224 0.0406 0.003 0.12 Permafrost 21 0.3 0.022 0.86
Water in lakes 2.0587 0.1764 0.013 - Fresh water in lakes 1.2364
0.091 0.007 0.26 Salt water in lakes 0.8223 0.0854 0.006 - Lagoons
and swamps 2.682.6 0.01147 0.0002 0.006 Rivers 148.8 0.00212 0.0002
0.0006 Water in living beings 510 0.0012 0.0.0001 0.0003 Water in
the atmosphere 510 0.0129 0.001 0.04 Water total 510 1385.98561 100
- Fresh water total 148.8 35.02921 2.53 100 Data from:Global Change
in the Geosphere-Biosphere, NRC, 1986, Shiklomanov and Skolov
(1983). You can see also: Oki et al., 2001; Shiklomanov, I. A.,
2000; Vorosmarty et al., 2000; Hanasaki et al., 2006 13R.
RigonMonday, March 11, 13
- 19. Introduction to Hydrology The Water Cycle sustains Life on
Earth shapes the surface of the Earth regulates the climate The
engine of the Water Cycle is composed of: solar radiation, which
causes gradients in temperature, pressure, and density, and the
phase changes of water in the atmosphere and within the soil; the
force of gravity; surface tensions; and electrochemical forces.
14R. RigonMonday, March 11, 13
- 20. Hower ... Looking to our neighbors Venus Earth Mars No one
has very much oxygen and water 15A. KleidonMonday, March 11,
13
- 21. However... Looking to our neighbors Venus Earth Mars 96.5%
CO2 78 % N2 93.5% CO2 3.5% N2 31% O2 2.7% N2 16A. KleidonMonday,
March 11, 13
- 22. Does life influences the Hydrological Cycle ? Is therefore
the actual composition of atmpsphere due to the presence of life ?
Figure 1 The effect of life on the Earths atmosphere. Lenton, T.,
1998 a, Atmospheric compositions of Earth, Mars and Venus
(excluding water vapour and noble gases). b, Estimated fluxes of
gases at the Earths surface in teramoles (1012 moles) per year,
with (pre-industrial) life and without life. 17A. KleidonMonday,
March 11, 13
- 23. Does life influences the Hydrological Cycle ? Oxygen
concentration Earth before present Holland, 2006 Time before
present (Gyears) 18A. KleidonMonday, March 11, 13
- 24. Does life influences the Hydrological Cycle ? CO2
atmospheric concentration before present 19A. KleidonMonday, March
11, 13
- 25. Does life influences the Hydrological Cycle ? Therefore We
can conjecture that, maybe, is also true the reverse (water
maintains life) but the hydrological cycle, se we see it, could
also be the product of the presence of life on Earth 20R.
RigonMonday, March 11, 13
- 26. Introduction to Hydrology The Water Cycle Figure from
Horton, 1931 21R. RigonMonday, March 11, 13
- 27. Introduction to Hydrology The good old hydrological cycle
Oki and Kanae, 2006 22R. RigonMonday, March 11, 13
- 28. RFWR A relevant aspect Is that just part of the whole water
can be utilized by humans and ecosystems. This part is usually
named Renewable Freshwater resources (RFWR) Is there enough RFWR ?
23R. RigonMonday, March 11, 13
- 29. RFWR The good old hydrological cycle Oki and Kanae, 2006
24R. RigonMonday, March 11, 13
- 30. RFWR The good old hydrological cycle Oki and Kanae, 2006
25R. RigonMonday, March 11, 13
- 31. RFWR The good old hydrological cycle Oki and Kanae, 2006 La
maggior parte della RFWR costituita della portata dei fiumi 26R.
RigonMonday, March 11, 13
- 32. RFWR The good old hydrological cycle Oki and Kanae, 2006
27R. RigonMonday, March 11, 13
- 33. RFWR Blue Water Green Water White Water Blue Water: surface
water and groundwater Green Water: soil water, available for plants
White Water: just atmospheric water 28R. RigonMonday, March 11,
13
- 34. RFWR Aeschbach-Hertig and Gleeson, 2012 29R. RigonMonday,
March 11, 13
- 35. Introduction to Hydrology Compartment Volume % Source
Incoming Emission Outgoing Flow Flow Oceans 1338 96.51 P 4581 E
5051 3242 3612 3853 4243 R 471 372 403 Atmosphere 0.013 0.001 ET
5771 P 5771 from the landmasses 721 622 992 713 1113 from the
oceans 5051 3612 3242 4243 3853 Landmasses 48 3.46 P 1191 ET 721
992 622 1113 712 R 471 372 403Global water flows (1-Shiklomanov and
Sokolov,1983 ; 2- Peixoto e Kettani, 1973 3- Baumgartner e Reichel,
1975.The volumes are in millions of km cubed and the flows are in
millions of km cubed per year. P = Precipitations; R =Surface
runoff; E =evaporation ; ET = evapotranspiration 30 R. RigonMonday,
March 11, 13
- 36. Extreme Events Looking to the mean hydrological budgets is
not just the only wat Extreme events matter 31R. RigonMonday, March
11, 13
- 37. Spatial and Temporal ScalesGentine, 2012 32R. RigonMonday,
March 11, 13
- 38. Spatial and Temporal Scales Cycles ? Peixoto-Oort, 1992;
Mitchell, 1974 33R. RigonMonday, March 11, 13
- 39. Il mezzo il messaggio Burri-Untitled 1952 Riccardo
RigonMonday, March 11, 13
- 40. The medium is the message The water cycle is not only
defined by the presence of water and its flows, but also by the
media on which, or through which, these water flows take place: the
atmosphere vegetation the ground surface soils aquifers 35R.
RigonMonday, March 11, 13
- 41. The medium is the message The atnospheric boundary Layer
36R. RigonMonday, March 11, 13
- 42. The medium is the message Vegetation 37R. RigonMonday,
March 11, 13
- 43. The medium is the message The terrain surface 38R.
RigonMonday, March 11, 13
- 44. The medium is the message Soils O horizon O horizon A
horizon real soil A horizon B horizon layer real soil layer B
horizon C horizon C horizon unconsolidated rock Bedrock BedRock
39R. RigonMonday, March 11, 13
- 45. The medium is the message Below the soils 40R. RigonMonday,
March 11, 13
- 46. The medium is the message Aquifers
http://www.wec.ufl.edu/extension/gc/harmony/images/aquifer.gif 41R.
RigonMonday, March 11, 13
- 47. Hydrological information a classical view La Scuola di
Atene, Raffaello Riccardo RigonMonday, March 11, 13
- 48. The global hydrological cycle Distribution of Mean Annual
Precipitation Da Dingman, 1994 43 R. RigonMonday, March 11, 13
- 49. The global hydrological cycle Precipitation Patterns from
Dingman, 1994 44 R. RigonMonday, March 11, 13
- 50. The global hydrological cycle Areas Seasonally Covered by
Snowfrom Dingman, 1994 45 R. RigonMonday, March 11, 13
- 51. The global hydrological cycle The Largest Rivers on Earth
from Dingman, 1994 46 R. RigonMonday, March 11, 13
- 52. The global hydrological cycle the thousand longest rivers
on earthFrom the work "the thousand rivers (i mille umi) by Arrigo
Boetti and Anna-marie Sauzeau-Boetticlassication by order of
magnitude is the most common method for classifying information
relative to a certain category, in the case of rivers, size can
beunderstood to the power of one, two, or three, that is, it can be
expressed in km, km2, or m3 (length, catchment area, or discharge),
the length criterion is the mostarbitrary and naive but still the
most widespread, and yet it is impossible to measure the length of
a river for the thousand and more perplexities that its uid
naturebrings up (because of its meanders and its passage through
lakes, because of its ramications around islands or its movements
in the delta areas, because ofmans intervention along its course,
because of the elusive boundaries between fresh water and salt
water...) many rivers have never been measured becausetheir banks
and waters are inaccessible, even the water spirits sympathise at
times with the ora and the fauna in order to keep men away, as a
consequencesome rivers ow without name, unnamed because of their
untouched nature, or unnamable because of human aversion (some
months ago a pilot ying low overthe brazilian forest discovered a
new tributary of the amazon river). other rivers cannot be
measured, instead, because they have a name, a casual name givento
them by men (a single name along its entire course when the river,
navigable, becomes means of human communication; different names
when the river,formidable, visits isolated human groups); now the
entity of a river can be established either with reference to its
name (trail of the human adventure), or withreference to its
hydrographic integrity (the adventure of the water from the
remotest source point to the sea, independently of the names
assigned to the variousstretches), the problem is that the two
adventures rarely coincide, usually the adventure of the explorer
is against the current, starting from the sea; the adventureof the
water, on the other hand, nishes there, the explorer going upstream
must play heads or tails at every fork, because upstream of every
conuenceeverything rarees: the water, sometimes the air, but always
ones certainty, while the river that descends towards the sea
gradually condenses its waters and thecertainty of its inevitable
path, who can say whether it is better to follow man or the water?
the water, say the modern geographers, objective and humble, and
sothe begin to recompose the identity of the rivers, an example:
the mississippi of new orleans is not the extension of the
mississippi that rises from lake itasca inminnesota, as they teach
at school, but of a stream that rises in western montana with the
name jefferson red rock and then becomes the mississippi-missouri
in stlouis, the number of kilometres upstream is greater on the
missouri side, but in fact this scientic method is applied only to
the large and prestigious rivers, thoselikely to compete for
records of length, the methodological rethinking is not wasted on
minor rivers (less than 800km) which continue to be called, and
measured,only according to their given name, even if, where there
are two source course (with two other given names), the longer of
the two could be rightly included in themain course, the current
classication reects this double standard, this follows the laws of
water and the laws of men, because that is how the
relevantinformation is given, in short, it reects the biased game
of information rather than the uid life of water, this classication
was began in 1970 and ended in 1973,some data were transcribed from
famous publications, numerous data were elaborated from material
supplied non-european geographic institution,
governments,universities, private research centres, and individual
accademics from all over the world, this convergence of
documentation constitutes the the substance and themeaning of the
work, the innumerable asterisks contained in these thousand record
cards pose innumerable doubts and contrast with the rigid
classicationmethod, the partialness of the existing information,
the linguistic problems associated with their identity, and the
irremediably elusive nature of water all mean thatthis
classication, like all those that proceeded it or that will follow,
will always be provisional and illusionaryAnne-marie
Sauzeau-Boetti(TN the text is published without capital letters) 47
R. RigonMonday, March 11, 13
- 53. Modern Hydrological Information Luigi Ghirri, Infinito,
1974 Riccardo RigonMonday, March 11, 13
- 54. The global hydrological cycle
http://www-cger.nies.go.jp/grid-e/gridtxt/prec_geo.html 49 R.
RigonMonday, March 11, 13
- 55.
http://geography.uoregon.edu/envchange/clim_animations/#Global%20Water
%20Balance R. RigonMonday, March 11, 13 The global hydrological
cycle 50
- 56.
http://geography.uoregon.edu/envchange/clim_animations/#Global%20Water
%20Balance R. RigonMonday, March 11, 13 The global hydrological
cycle 51
- 57.
http://geography.uoregon.edu/envchange/clim_animations/#Global%20Water
%20Balance R. RigonMonday, March 11, 13 The global hydrological
cycle 52
- 58.
http://geography.uoregon.edu/envchange/clim_animations/#Global%20Water
%20Balance R. RigonMonday, March 11, 13 The global hydrological
cycle 53
- 59. The global hydrological cycle Is it possible to close the
terrestrial water budget with satellite measures ? T O P E X /
TRMM/CMORPH CERES/MODIS/ P O SE ID O N/ GRACE AIRS Land PERSIAN,
GPM J A S O N , Flux SWOT Next future (2016) Now it is not. However
in the future ..... Wood et al., Closing the Terrestrial water
Budget from satellite Remote sensing, GRL, 2009 54Marco
ManciniMonday, March 11, 13
- 60. The global hydrological cycle Global Digital Terrain Data
The elevation data resulting from the SRTM are probably the best
known global dataset Rabus et al. 2003.http://www,analist.net The
area covered by the mission goes from 60 North to 58 South. The
data was obtained with an X-band radar (NASA and MIL, that covers
100% of the area) and by a C-band radar (DLR and ASI) that covers
40%. 55 T. HenglMonday, March 11, 13
- 61. The global hydrological cycle Global Digital Terrain Data
The DLR and ASI data, nonpublic, would be available with a
resolution of about 30m (1 arcsec). A model of the Earths surface,
ETOPO1 Global Relief Model (which includes bathymetry data) is
available with a resolution of 1km and can behttp://www,analist.net
downloaded from NOAAs National Geophysical Data Center (Amante and
Eakins, 2008). Global DEMs, at various resolutions, from 1km to
2.5, 5, and 10 arcminutes, are available at the worldclim website.
The SRTM DEM at 90m resolution can be obtained from CGIAR -
Consortium for Spatial Information. In June 2009 a DEM based on the
ASTER satellite (GDEM) survey with a 30m resolution was produced.
The GDEM was obtained by stereoscopic correlation of 1.3 million
optical ASTER images, that cover about 98% of the Earths surface.
The images can be downloaded from NASAs EOS data archive or from
Japans Ground Data System. 56 T. Hengl Monday, March 11, 13
- 62. The global hydrological cycle Global Water ResourcesThe
most thorough global inventory of water resources is the Global
Lakes andWetlands Database (GLWD), which includes lakes, catchment
areas, rivers and variouswetlands. The map is in raster format with
pixels at 30-arcsec resolution (Lehner andDoll, 2004). Vector
images of the Earths catchments and similar vector data can
beobtained from RS GIS Unit of the International Water Management
Institute (IWMI).http://www,analist.net 57 T. Hengl Monday, March
11, 13
- 63. The global hydrological cycle Climatic Maps WorldClim.org
provides global maps of some 18 bioclimatic parameters derived
(with thin plate smoothing splines) using >15,000 weather
stations (Hijmans et al., 2005). The climatic parameters include:
mean, minimum and maximum temperatures, monthly precipitation and
bioclimatic variables. All at ground resolution of 1
km.http://www,analist.net Mean annual temperature 58 T. Hengl
Monday, March 11, 13
- 64. The global hydrological cycle Climatic
Mapshttp://www,analist.net Annual precipitations 59 T. Hengl
Monday, March 11, 13
- 65. The global hydrological cycle Climatic
Mapshttp://www,analist.net Coefficient of variation of rainfall 60
T. Hengl Monday, March 11, 13
- 66. The global hydrological cycle Geological Maps Soil maps
play an elemental role in Hydrology and Agrometeorology. The only
truly global soil map is that available from USGS Global Soil
Regions with a 60-arcsec resolution (FAO-UNESCO, 2005). Geological
maps have now been integrated by the OneGeology project. The USDA
Soil Survey Division also distributes global maps of wetland areas
(which include: upland, lowland, organic, permafrost and salt
affected wetlands). The ISRIC maintains a global database of soil
profiles comprising over 12,000 profiles with analytic descriptions
and the parameters for 50 soil types (Batjes,http://www,analist.net
2008). 61 T. Hengl Monday, March 11, 13
- 67. The global hydrological cycle Geological
Mapshttp://www,analist.net 62 T. Hengl Monday, March 11, 13
- 68. The global hydrological cycle Precipitations all over the
Earth in real-time http://sharaku.eorc.jaxa.jp/GSMaP/index.htm 63
R. RigonMonday, March 11, 13
- 69. Other data Other data on the web
http://abouthydrology.blogspot.it/2012/11/repertorio-nazionale-dei-dati.html
http://abouthydrology.blogspot.it/2012/08/free-cartographic-italian-data-on-web.html
http://nil-pipraen.blogspot.it/2012/04/hydrological-modeling.html
http://www.bafg.de/GRDC/EN/Home/homepage__node.html
http://www.nwl.ac.uk/ih/devel/wmo/hhcdbs.html 64R. RigonMonday,
March 11, 13
- 70. The Global Energy Balance Jackson Pollock Riccardo
RigonMonday, March 11, 13
- 71. The global energy budget Initial solar radiation Reflected
solar radiation Infrared radiation from Earth SPACE ATMOSPHERE
Reflected by modified after Wallace and Hobbs, 1977 air Net
emission from CO2, H20 Reflected by clouds Absorbed by CO2, O3,
dust Absorbed by CO2, H20 Absorbed by clouds Reflected by Absorbed
by Earths surface vegetation