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Changes in glaciation of the Balkhash–Alakol basin, central Asia, over recent decades

Published online by Cambridge University Press:  03 March 2016

I. Severskiy ,
E. Vilesov ,
R. Armstrong ,
A. Kokarev ,
L. Kogutenko ,
Z. Usmanova ,
V. Morozova  and
B. Raup
I. Severskiy
Affiliation:
Institute of Geography, Almaty, Kazakhstan
E. Vilesov
Affiliation:
Kazakh National University, Almaty, Kazakhstan
R. Armstrong
Affiliation:
National Snow and Ice Data Center, University of Colorado, Boulder, CO, USA
A. Kokarev
Affiliation:
Institute of Geography, Almaty, Kazakhstan
L. Kogutenko
Affiliation:
Nanjing University of Information Science and Technology, Nanjing, China
Z. Usmanova
Affiliation:
Institute of Geography, Almaty, Kazakhstan Kazakh National University, Almaty, Kazakhstan
V. Morozova
Affiliation:
Kazakhstan Agency of Applied Ecology, Almaty, Kazakhstan
B. Raup
Affiliation:
National Snow and Ice Data Center, University of Colorado, Boulder, CO, USA
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Abstract

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We describe changes in glaciers of the Balkhash-Alakol basin, central Asia, and analyse unified glacier inventories of the Zailiyskiy-Kungei and Jungar glacier systems and the Chinese part of the Ili river basin, as well as mass-balance monitoring data from Tsentralniy Tuyuksu glacier for the period 1957-2014. In spite of significant inter-basin differences, glaciation of the three glacial systems in the Ili river basin within Kazakhstan as well as within Chinese territory is changing simultaneously and similarly. Differences in the rates of glacier degradation are small and are affected primarily by the orientation of the flanks of the mountain ridges. Since the mid-1950s, glaciation of the region has remained degraded and, on average over the period examined, glaciers shrank at a rate of about 0.8% a-1 in area and about 1 % a-1 in ice volume. Glacial systems in large basins such as Balkhash-Alakol change simultaneously, linearly and at similar rates. The average rates of glacier reduction of the Zailiyskiy-Kungei, Jungar and upper Ili glacier systems for the period 1955/56-2008 amounted to 0.76%, 0.75% and 0.73% a-1 respectively.

Keywords

climate changeglacier hydrologyglacier mass balanceglacier volumemountain glaciers
Type
Paper
Information
Annals of Glaciology , Volume 57 , Issue 71 , March 2016 , pp. 382 - 394
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
Copyright © The Author(s) 2016

References

Aizen, V, Aizen, E, Melack, J and Dozier, J (1997) Climatic and hydrologic changes in the Tien Shan, Central Asia. J. Climate, 10, 1393–1404 (doi: 10.1175/1520-0442(1997)010<1393: CAHCIT>2.0.CO;2)2.0.CO;2>CrossRefGoogle Scholar
Aizen, V, Kuzmichenok, V, Surazako, A and Aizen, E (2006) Assessment of glacial area and volume change in Tien Shan (Central Asia) during the last 140 years. Ann. Glaciol., 43, 202–213 CrossRefGoogle Scholar
Aizen, V, Kuzmichenok, V, Surazakov, A and Aizen, E (2007) Glacier changes in the Tien Shan as determined from topographic and remotely sensed data. Global Planet. Change, 56, 328–340 CrossRefGoogle Scholar
Batyrov, R and Yakovlev, Ð (2004) Monitoring gornih lednikov nekotorih raionov Gissro-Alaya s ispolzovaniem kosmicheskih snimkov ASTER TERRA [Monitoring of mountain glaciers in some areas of Gissar-Alai using satellite imagery ASTER TERRA]. Glaciol. gornih raionov. Trudi NICMI [Glaciology in mountain areas: NICMI works], 3(248), 22–27 Google Scholar
Bolch, T (2006) GIS- und fernerkundungsgestützte Analyse und Visualisierung von Klima- und Cletscheränderungen im nördli-chen Tien Shan (Kasachstan/Kyrgyzstan) mit einem Vergleich zur Bernina-Gruppe/Alpen. (Dissertation, Friedrich-Alexander-Universität Erlangen-Nürnberg)Google Scholar
Bolch, T (2007) Climate change and glacier retreat in northern Tien Shan (Kazakhstan/Kyrgyzstan) using remote sensing data. Global Planet. Change, 56, 1–12 CrossRefGoogle Scholar
Bolch, T (2015) Glacier area and mass changes since 1964 in Ala Archa Valley, Kyrgyz Ala-Too, northern Tien Shan. Led i Sneg [Snow and Ice], 1(129), 28–39 Google Scholar
Bolch, T and Marchenko, SS (2009) Significance of glaciers, rockglaciers and ice rich permafrost in the Northern Tien Shan as water towers under climate change conditions. In Braun, L, Hagg, W, Severskiy, I and Young, G eds Assessment of snow, glacier and water resources in Asia, vol. 8. International Hydrological Programme - Hydrology and Water Resources Programme, Koblenz, 132–144 Google Scholar
Bolch, T, Menounos, B and Wheate, RD (2010) Landsat-based inventory of glaciers in western Canada, 1985-2005. Remote Sens. Environ., 114, 127–137 CrossRefGoogle Scholar
Cao, MS (1998) Detection of abrupt changes in glacier mass balance in the Tien Shan mountains. J. Glaciol., 44, 352–358 CrossRefGoogle Scholar
Cherkasov, P (1969) Katalog lednikov SSSR. Vol. 13. Centralnii i Ujnii Kazakhstan, Issue 2. Bassein ozera Balkhash, part 7 [Glaciers inventory of the USSR. Vol. 13. Central and Southern Kazakhstan. Issue 2 Balkhash lake Basin, part 7]. Hydrometeoizdat, Leningrad, 82 Google Scholar
Cherkasov, P (1970) Katalog lednikov SSSR. Vol. 13. Centralnii i Ujnii Kazakhstan, Issue 2. Bassein ozera Balkhash, part 6 [Glaciers inventory of the USSR. Vol. 13. Central and Southern Kazakhstan. Issue 2 Balkhash lake Basin, part 6]. Hydrometeoizdat, Leningrad, 84 Google Scholar
Cherkasov, P (1975) Katalog lednikov SSSR. Vol. 13. Centralnii i Ujnii Kazakhstan, Issue 2. Bassein ozera Balkhash, part 4 [Glaciers inventory of the USSR. Vol. 13. Central and Southern Kazakhstan. Issue 2 Balkhash lake Basin, part 4]. Hydrometeoizdat, Leningrad, 83 Google Scholar
Cherkasov, P (1980) Katalog lednikov SSSR. Vol. 13. Centralnii i Ujnii Kazakhstan, Issue 2. Bassein ozera Balkhash, part 5 [Glaciers inventory of the USSR. Vol. 13. Central and Southern Kazakhstan. Issue 2 Balkhash lake Basin, part 5]. Hydrometeoizdat, Leningrad, 82 Google Scholar
Cherkasov, P (2002) Sovremennoe sostoyanie lednikov Ili-Balkhashskogo regiona [Modern state of glaciers of the Ili-Balkhash Region]. In Kudekov, TK ed. Sovremennoe ecolo-gicheskoe sostoyanie basseina ozera Balkhash [Modern ecological state of the Balkhash Lake Basin]. Kaganat, Almaty, 141–198 Google Scholar
Cherkasov, P and Nikitin, SA (1989) K metodike rascheta ob'ema gornih lednikov po dannim nazemnoi i vozdushnoi radioloka-cionnoi s'emki (na primere Dzhungarskogo Alatau) [To a design procedure of volume of glaciers according to ground and air radar-tracking shooting (on an example Dzungarian Alatau)]. Ledniki, snezhnii pokrov i lavini v gorah Kazakhstana [Glaciers, snow cover and avalanches in mountains of Kazakhstan]. Nauka, Alma-Ata, 18–37 Google Scholar
Cogley, JC (2016) Glacier shrinkage across High Mountain Asia. Ann. Glaciol. 57(71) 41–49 (doi: 10.3189/2016AoC71A040) (see paper in this issue)CrossRefGoogle Scholar
Desinov, L and Konovalov, V (2007) Distancionnyi monitoring mnogoletnego rezhima oledeneniya Pamira [Distant monitoring of the long-term regime of glaciers in the Pamir]. Mater. Glaciol. Issled. [Data Glaciol. Stud.], 103, 129–133 Google Scholar
Ding, L, Xie, W, Liu, C, Wang, C and Wang, Z eds (1986) Glacier inventory of China III. Tienshan mountains (Ili River Drainage Basin). Science Press, Beijing [in Chinese]Google Scholar
Driedger, C and Kennard, P (1986) Glacier volume estimation on Cascade volcanoes: an analysis and comparison with other methods. Ann. Glaciol., 8, 59–64 CrossRefGoogle Scholar
Dyurgerov, M (2010) Reanalysis of glacier changes: from the IGY to the IPY, 1960-2008. Data Glaciol. Stud., 108, 116 Google Scholar
Dyurgerov, M and Meier, M (2005) Glaciers and the changing earth system: a 2004 snapshot. (INSTAAR Occasional Paper 58) Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO Google Scholar
Eder, KI, Geiss, N, Rentsch, H, Kokarev, E and Uvarov, V (2005) Surveying and mapping of the Tuyuksu Glacier Region, Kazakhstan, 1 :10000. In World Glacier Monitoring Service, Fluctuations of glaciers 1995-2000 (Vol. VIII), ed. Haeberli, W, Noetzli, J, Zemp, M, Baumann, S and Frauenfelder, R. ICSU (FAGS)/IUGG (IACS)/UNEP/UNESCO/WMO, World Glacier Monitorig Service, Zürich, 72–73 Google Scholar
Farinotti, D and 7 others (2015) Substantial glacier mass loss in the Tien Shan over the past 50 years. Nature Geosci., 8, 716–722 CrossRefGoogle Scholar
Fateev, V and Cheban, V (1969) Katalog lednikov SSSR Tom. 14, vyp. 2, tcast 4. Basseyny pravykh pritokov rekir Chu nozhe Baamskogo ustchelia [Catalog of glaciers of the SSSR Vol. 14, issue 2, part 4. Basins of the right tributaries of the Chu river laver Boam Canyon]. Hydrometeoizdat, Leningrad, 60 Google Scholar
Gao, WY, Li, ZQ, Li, KM and Zhang, M (2011) Glacier variation in the Kukesu River basin during 1963-2004 based on remote sensing data and GIS techniques. Arid Land Geogr., 34(2), 252–261 [in Chinese with English summary]Google Scholar
Tujuksu, Gletschergebiet, Alatau, Sailiski (1961) M 1:10000. Institut für Kartographie T.H. Dresden-VEB Hermann Haack, Dresden Google Scholar
Guo, W and 10 others (2015). The second Chinese glacier inventory: data, methods and results. J. Glaciol, 61(226), 357–372 (doi: 10.3189/2015JoG14J209)CrossRefGoogle Scholar
Kaldybayev, A, Chen, Y and Vilesov, E (2016) Glacier change in Karatal river basin, Zhetysu (Dzhungar) Alatau, Kazakhstan. Ann. Glaciol, 57(71), 11–19 (doi: 10.3189/201 6AoG71A005) (see paper in this issue)CrossRefGoogle Scholar
Kokarev, A and Shesterova, I (2011) Izmenenie lednikovih system severnogo sklona Zailiiskogo Alatau vo vtoroi polovine XX i nachale XXI vekov [Change of the glacier systems on the northern slope of Zailiyskiy Alatau for the second half of XX and the beginning of XXI centuries]. Led i Sneg [Ice and Snow], 4(116), 39–46 Google Scholar
Kotlyakov, V (2004) Izbrannie sochineniya. Kniga 2. Snezhnii pokrov i ledniki Zemli [Selected works. Book 2. Snow cover and glaciers of the Earth]. Nauka, Moscow Google Scholar
Kotlyakov, V ed. (2006) Oledenenie Sevenoi i Centralnoi Eurasii v sovremennuyu epohu [Glaciation in North and Central Eurasia at present time]. Nauka, Moscow Google Scholar
Kotlyakov, V and Komarova, A (2007) Geography: concepts and terms: dictionary in five languages. Nauka, Moscow Google Scholar
Kotlyakov, V and Severskiy, I (2009) Glaciers of central Asia: current situation, changes and possible impact on water resources. In Braun, L, Hagg, W, Severskiy, I and Young, G eds Assessment of snow, glacier and water resources in Asia, vol. 8. International Hydrological Programme-Hydrology and Water Resources Programme, Koblenz, 151–159 Google Scholar
Kotlyakov, V, Zi-chu, Xie, Shishong, M, Wamg, X, Khromova, T and Nosenko, G (2012) Changing of the Altai glacier system since the mid-twentieth century and its response to the climate warming in future. Ice Snow, 3(119), 17–24 Google Scholar
Kutuzov, S (2012) Izmenenie ploshchadi i obema lednikov khr. Terskej Ala-Too vo vtoroj polovine XXV [Glacier surface area and volume changes in the Terskey Ala-Too, Tien-Shan in the second half of the 20th century]. Led i Sneg [Ice and Snow], 117, 5–14.Google Scholar
Kutuzov, S and Shahgedanova, M (2009) Glacier retreat and climatic variability in the eastern Terskey-Alatoo, inner Tien Shan between the middle of the 19th century and beginning of the 21st century. Global Planet. Change, 69, 59–70 CrossRefGoogle Scholar
Li, B, Zhu, AX, Zhang, Y, Pei, T, Qin, C and Zhou, C (2007) Glacier change over the past four decades in the middle Chinese Tien Shan. J. Glaciol., 52(178), 425–432 (doi: 10.3189/172756506781828557)CrossRefGoogle Scholar
Liu, S and 7 others (2006) Glacier retreat as a result of climate warming and increased precipitation in the Tarim river basin, northwest China. Ann. Glaciol., 43, 91–96 (doi: 10.3189/172756406781812168)CrossRefGoogle Scholar
Macheret, Yu.Ya., Cherkasov, P and Bobrova, L (1988) Tolschina i ob'em lednikov Dzjungarskogo Alatau po dannym aeroradiat-sionnogo zondirovaniya [Thickness and volume of glaciers of the Jungar Alatau on the data of radiecho soundings]. Mater. Glaciol. Issled. [Data Glaciol. Stud.], 62, 59–71 Google Scholar
Makarevich, K and 7 others (1969) Oledenenie Zailiiskogo Alatau [Glaciation of Zailiyskiy Alatau]. Nauka, Moscow Google Scholar
Makarevich, K, Vilesov, E, Golovkova, R, Denisova, T and Shabanov, P (1984) Lednik Tuyuksu [Tuyuksu glaciers]. Gidrometeoizdat, Leningrad Google Scholar
Narama, C, Shimamura, Y, Nakayama, D and Abdrakhmatov, K (2006) Recent changes of glacier coverage in the western Terskey-Alatoo range, Kyrgyz Republic, using Corona and Landsat. Ann. Glaciol., 43, 223–229 (doi: 10.3189/172756406781 8121 95)CrossRefGoogle Scholar
Narama, C, Severskiy, I and Yegorov, A (2009) Current state of glacier changes, glacial lakes, and outburst floods in the lie Ala-Tau and Kungoy Ala-Too ranges, northern Tien Shan mountains. Ann. Hokkaido Geogr., 84, 22–32 Google Scholar
Narama, C, Kääb, A, Duishonakunov, M and Abdrakhmatov, K (2010) Spatial variability of recent glacier area changes in the Tien Shan Mountains, Central Asia, using Corona (∼1970), Landsat (∼2000), and ALOS (∼2007) satellite data. Global Planet. Change, 71, 42–54 CrossRefGoogle Scholar
Niederer, P, Bilenko, V, Ershova, N, Hurni, H, Yerokhin, S and Maselli, D (2007) Tracing glacier wastage in the Northern Tien Shan (Kyrgyzstan/Central Asia) over the last 40 years. Climate Change, 86, 227–234 (doi: 10.1007/s10584-007-9288-6)CrossRefGoogle Scholar
Nikitin, S (2009) Zakonomernosti raspredeleniya lednikovih resur-sov v Russkom Altae, ocenka ih resursov i dinamiki [Pattern of distribution of ice in the Russian Altai glaciers, evaluation of its resources and dynamics]. Mater. Glaciol. Issled. [Data Glaciol. Stud.], 107, 87–96 Google Scholar
Nuimura, T and 12 others (2014). The GAMDAM glacier inventory: a quality-controlled inventory of Asian glaciers. Cryosphere Discuss., 8, 2799–2829 (doi: 10.5194/tcd-8-2799-2014)Google Scholar
Osmonov, A, Bolch, T, Xi, C, Wei, J and Kurban, A (2013) Glacier characteristics and changes in the Sary-Jaz River Basin (Central Tien Shan) 1990-2010. Remote Sens. Lett, 4, 725–734.CrossRefGoogle Scholar
Paul, F and 9 others (2009) Recommendations for the compilation of glacier inventory data from digital sources. Ann. Glaciol., 50(53), 119–126 (doi: 10.3189/172756409787769528)CrossRefGoogle Scholar
Paul, F and 19 others (2013). On the accuracy of glacier outlines derived from remote-sensing data. Ann. Glaciol., 54(63), 171–182 (doi: 10.31 89/201 3AoC63A296)CrossRefGoogle Scholar
Pfeffer, W and 18 others (2014). The Randolph Glacier Inventory: a globally complete inventory of glaciers. J. Glaciol., 60(221), 537–552 (doi: 10.31 89/2014JoG13J176)CrossRefGoogle Scholar
Pieczonka, T and Bolch, T (2015) Region-wide glacier mass budgets and area changes for the Central Tien Shan between ∼1975 and 1999 using Hexagon KH-9 imagery. Global Planet. Change, 128, 1–13 CrossRefGoogle Scholar
Severskiy, I (2009) Current and projected changes of glaciation in Central Asia and their probable impact on water resources. In Braun, L, Hagg, W, Severskiy, I and Young, G eds Assessment of snow, glacier and water resources of Asia, vol. 8. International Hydrological Programme-Hydrology and Water Resources Programme, Koblenz, 99–111 Google Scholar
Severskiy, I (2011) K probleme monitoringa izmeneniya oledene-niya tselostnikh glyatsialnikh system [On the problem of monitoring of changes in glaciation of holistic glacial systems]. Vop. Geog. Geoecol. [Iss. Geog. Geoecol], 2, 12–18 Google Scholar
Severskiy, IV, Kokarev, AL, Severskiy, SI, Tokmagambetov, TG, Shesterova, IN and Shagarova, LI (2006) Contemporary and prognostic changes of glaciation in Balkhash Lake basin. Kaganat, Almaty Google Scholar
Severskiy, I, Kokarev, A and Pimankina, N (2012a) Snezhnie I ledovie resursi Kazakhstana. Vodnie resursi Kazakhstana: Otsenka, Prognoz, Upravlenie [Snow and ice resources of Kazakhstan. Water Resources of Kazakhstan: assessment, prediction, control: In vol. VI]. Kaganat, Almaty, 246 Google Scholar
Severskiy, I and 6 others (2012b) Lednikovie systemy Balkhash-Alakolskogo Basseina: sostoyanie, sovremennie izmeneniya [Glacier systems of the Balkhash-Alakol basin: state, contemporary changes]. Voprosy. Geogr. Geoecol. [Issled. Geogr. Geoecol.], 2, 31–40 Google Scholar
Shangguan, D and 9 others (2006) Monitoring the glacier changes in the Muztag Ata and Konggur mountains, east Pamirs, based on Chinese Glacier Inventory and recent satellite imagery. Ann. Glaciol., 43, 79–85 (doi: 10.3189/172756406781812393)CrossRefGoogle Scholar
Shchetinnikov, SA (1998) Morphologiya i regime lednikov Pamiro-Alaya [The morphology and regime of Pamir-Alai glaciers]. Central Asia Hydro-Meteorological Institute, Tashkent Google Scholar
Shi, Y (2008) Concise Glacier Inventory of China. Shanghai Popular Science Press, Lanzhou Google Scholar
Sorg, A, Bolch, T, Stoffel, M, Solomina, O and Beniston, M (2012) Climate change impacts on glaciers and runoff in Tien Shan (Central Asia). Nature Climate Change, 2(10), 725–731 CrossRefGoogle Scholar
Unger-Shayesteh, K and 6 others (2013) What do we know about past changes in the water cycle of Central Asian headwaters? A review. Global Planet. Change, 110, 4–25 CrossRefGoogle Scholar
Usubaliev, R, Dudashvily, A, Elemanov, O (2012) Oledenenie cevernykh sklonov Turkestanskogo b Alayskogo khrebtov i ego covremennaya dinamika [Glacierization of the northern slopes of the Turkestan and Alai ridges and their contemporary dynamics]. Led I Sneg [Snow and Ice], 1(117), 24–28 Google Scholar
Vilesov, E (1968) Katalog lednikov SSSR. Vol. 13. Centralnii i Ujnii Kazakhstan, Issue 2. Bassien ozera Balkhash, part 2 [Glaciers inventory of the USSR. Vol. 13. Central and Southern Kazakhstan. Issue 2 Balkhash lake Basin, part 2]. Hydrometeoizdat, Leningrad Google Scholar
Vilesov, E (1969) Katalog lednikov SSSR. Vol. 13. Centralnii i Ujnii Kazakhstan, Issue 2. Bassien ozera Balkhash, part 3 [Glaciers inventory of the USSR. Vol. 13. Central and Southern Kazakhstan. Issue 2 Balkhash lake Basin, part 3]. Hydrometeoizdat, Leningrad Google Scholar
Vilesov, E and Khonin, R (1967) Katalog lednikov SSSR. Vol. 13. Centralnii i Ujnii Kazakhstan, Issue 2. Bassien ozera Balkhash, part 1 [Glaciers inventory of the USSR. Vol. 13. Central and Southern Kazakhstan. Issue 2 Balkhash lake Basin, part 1.] Hydrometeoizdat, Leningrad Google Scholar
Vilesov, E and Morozova, V (2003) Lednik Tuyuksu; resultati sravneniya s'emok 1958 i 1998 [Tuyuksu glacier: the results of the comparison of the surveys as of 1958 and 1998]. Gidrometeorol. ecol. [Hydrometeorol. Ecol.], 3, 82–90 Google Scholar
Vilesov, E and Uvarov, V (2001) Evoluciya sovremennogo oledene-niya Zailiyskogo Alatau v XX veke [The evolution of modern glaciation of Zailiyskiy Alatau in XX century]. PH KazNU, Almaty Google Scholar
Vilesov, E, Morozova, V and Severskiy, I (2013) Oledenenie Dzhungarskogo (Zhetysu) Alatau: proshloe, nastoyashee, bu-dushee [Glaciation of jungar (Zhetysu) Alatau: past, present, future]. Volkova, Almaty Google Scholar
Vilesov, E, Severskiy, I and Morozova, V (2014) Dinamika oledeneniya Kazakhstanskogo Altaya za 60 let [Dynamics of glaciation in the Kazakh part of Altai during 60 years]. Led i Sneg [Ice and Snow], 2(126), 14–21 Google Scholar
Vinogradov, ON and Krenke, AN eds (1966) Rukovodstvo po sostavleniyu kataloga lednikov SSSR [Guide to the compilation of the Catalogue of Glaciers of the USSR]. Hydrometeoizdat, Leningrad Google Scholar
WGMS (2008) Global glacier changes: facts and figures, ed. Zemp, M, Roer, I, Kääb, A, Hoelzle, M, Paul, F and Haeberli, W. UNEP, World Glacier Monitoring Service, Zürich Google Scholar
WGMS (2013) Glacier mass balance bulletin No. 12 (2010-2011), ed. Zemp, M and 6 others. ICSU (WDS)/IUGG (IACS)/UNEP/UNESCO/WMO, World Glacier Monitoring Service, Zürich (doi: 10.5904/wgms-fog-2013-11)Google Scholar
Yao, T, Wang, Y, Liu, S, Pu, J, Shen, Y and Lu, A (2009) Recent glacial retreat in the Chinese part of High Asia and its impact on water resources of Northwest China. In Braun, L, Hagg, W, Severskiy, I and Young, G eds Assessment of snow, glacier and water resources of Asia, vol. 8. International Hydrological Programme-Hydrology and Water Resources Programme, Koblenz, 26–35 Google Scholar