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DFG-Graduiertenkolleg Workshop

„Isotopes and geochemical methods in hydrology“

Veranstaltungsort und Zeitplan

Accomodation

Hotel „Weiße Mühle“  01776 Schönfeld Tel: 035052/20674

OUTLINE OF THE PROGRAMME

Monday, June 14, 1999   8:30 -   9:00 Opening of the Seminar   9:00 - 10:00 Introductory lecture (KR) 10:00 - 10:30 Coffee break 10:30 - 12:00 Radioactive isotopes – fundamentals (WS) 12:00 - 14:00 Lunch break 14:00 - 15:30 Stable isotopes – fundamentals (KR) 15:30 - 16:00 Coffee break 16:00 - 17:30 Water chemistry – fundamentals (LA) 19:00 - 20:00 Über 100 Jahre Radioaktivität  (WS) Tuesday, June 15, 1999  8:30 - 10:00 Groundwater modeling - fundamentals (PM) 10:00 - 10:30 Coffee break 10:30 - 12:00 Groundwater modeling – con't (PM) 12:00 - 14:00 Lunch break 14:00 - 15:30 Unsaturated zone (LA) 15:30 - 16:00 Coffee break 16:00 - 17:30 Unsaturated zone – con't (LA) Wednesday, June 16, 1999   8:30 - 10:00 Demonstration of FLOWPC (PM) 10:00 - 10:30 Coffee break 10:30 - 12:00 Modeling – case studies (PM) 12:00 - 14:00 Lunch break 14:00 - 15:30 Case studies (AS) 15:30 - 16:00 Coffee break 16:00 - 17:30 Case studies (AS)

Thursday, June 17, 1999  8:30 - 10:00 Surface waters (KR) 10:00 - 10:30 Coffee break 10:30 - 11:00 Planning and implementing of isotope studies (LA, KR) 11:00  - 12:00 Discussion 12:00 - 14:00 Lunch break 14:00 - 15:30 Case studies (MG) 15:30 - 16:00 Coffee break 16:00 - 17:30 Case studies (MG) 19:00 - 20:00 Isotopes – Ages – and more (MG) Friday, June 18, 1999  8:30 - 10:00 Hydro-climatic changes (KR) 10:00 - 10:30 Coffee break 10:30 - 11:30 Demonstration of NETPATH (LA) 11:30 - 12:00 Closing the seminar

AS: Dr. A. SCHWANDT; KR: Prof. K. ROZANSKI (Poland); LA: Prof. L. ARAGUAS (Spanien); MG: Prof. M. GEYH (Hannover); PM: Prof. P. MALOSZEWSKI (München); WS: Prof. W. STOLZ (Freiberg)

Provisional Programme Of Lectures

I. Dr. Luis Araguás (CEDEX, Madrid, Spain)

A. Water chemistry – fundamentals

Major and trace elements as tracers of water. Geochemical processes. Geochemical evolution along flow paths. Mass balance approach in geochemical modelling: NETPATH.Integration of chemical and isotope data. Carbon-14 “age” estimation of groundwater: geochemical corrections. Presentation of AquaChem software.

B. Unsaturated zone

From precipitation to runoff: Information provided by isotope and geochemical tools. Evaluation of recharge processes and recharge rates: Environmental isotope methods. Transport in the unsaturated zone: Artificial tracing of water and solutes. Soil column experiments. Diffuse groundwater discharge: Estimation of discharge rates by using environmental isotopes.Water and solutes in the unsaturated zone as paleoclimatic archives.

Field examples:

• Evaluation of changes in hydrological regime due to forest clearing (Brazil)

• Nitrogen dynamics in the unsaturated zone (Costa Rica)

C. Case studies

• Paleohydrology of a coastal confined aquifer: Aveiro Cretaceous aquifer – Portugal;

• Estimation of regional recharge rates in Spain; Los Arenales aquifer – Spain

• Sources of arsenic in groundwater in Mexico, Comarca Lagunera aquifer system – México

• Salinization mechanisms in coastal aquifers

• Artificial tracing of rivers – example from Magdalena river Colombia

D. Possibilities and limitations of NETHPATH code

Use of NETPATH code: DBPGM and NETPTH modules. Chemical and isotope constraints, mineral and gaseous phases present in the system, mixing of water bodies, Rayleigh processes

Examples:

• Origin of sodium bicarbonate waters;

• Weathering processes;

• Chemistry of lake waters;
• C-14 “dating”: geochemical corrections.

II. Prof. Mebus Geyh (NLfB, Hannover)

„Die Isotopenhydrologie in der Praxis“

• Anwendungen zur Bestimmung der direkten Grundwasserneubildung

• Anwendungen zur Bestimmung der indirekten Grundwasserneubildung

• Anwendungen zur Datierung, geohydraulischen Modellierung und paläohydrologischen Rekonstruktion

• Anwendungen zur anthropogenen Störungen von genutzten Grundwassersystemen

III. Prof. Piotr Maloszewski (GSF, Munich)

1. Groundwater modelling – fundamentals

Theory of lumped-parameter models (tracer input-output relation, convolution integral, weighing function); transit time distribution functions (forms, parameters, properties); applicability of Black Box Model (BBM) approach to typical hydrogeological situations ; interpreting environmental tracer data using BBM; comparison of BBM approach with numerical modelling of water flow and mass-transport.

1. Groundwater modelling – case studies

• Application of stable isotope data for determining bank filtration from the Danube river to the drinking water supply of the Passau city;

• Combined application of stable isotope and tritium data in fissured porous aquifer of Lange Bramke (Harz);

• Combined application of stable isotope and tritium data for determining water flow dynamics and storage properties of the Schneealpe karstic aquifer (drinking water supply for Vienna);

• combined application of artificial and environmental tracers in the karst aquifer of Lurbach system (Graz, Austria)

C. Presentation of FLOWPC computer code

User-friendly computer code (PC-version) – application of Black Box Models for the interpretation of environmental tracer data (preparation of input and output files, running the programme).

IV. Prof. Kazimierz Rozanski (DEF-UMM, Krakow. Poland)

Stable isotopes – fundamentals

Fundamentals of isotope fractionation. Processes effecting isotopic composition of rainfall: fractionation of oxygen and hydrogen isotopes in phase changes (equilibrium, kinetic). Rayleigh process. Isotopic variability of meteoric waters (atmospheric water vapour and precipitation) in space and time: the IAEA/WMO network for isotopes in precipitation. Relationship between isotopic composition of rainfall and temperature of formation. Latitude effect. Amount effect. Altitude effect. Continental effect. Relationship between d²H and d¹⁸O, deuterium excess. In-storm variability. Seasonal effect.

Surface waters

Isotopes in lake studies - principles, types of problems addressed. Water balance of lakes with stable isotopes. Lake water-groundwater interaction. Isotopic composition of runoff: relationship with precipitation and groundwater (hydrograph separation). Use of Tritium/Helium-3 and Freons in studies of lake dynamics.

Examples:

• Interaction of small dredging lakes with adjacent groundwater system (Graz, Austria)

• Water balance of tropical lake (Lake Managua, Nicaragua)

• Isotope tools (¹⁸O and ²H, tritium, He-3, Freons) in studies of water dynamics of Caspian Sea

• Isotope records for Danube river

1. Hydroclimatic changes

Isotope composition of precipitation and climate. Reconstruction of past climatic and environmental changes from isotopic archives - isotope transfer functions. Dating tools. Continental archives of isotopic data related to past climate: ice cores, old groundwaters, speleothems, lake sediments.

Dr. A. Schwandt (Erfurt)

Wasser- und Salzlösungszuflüsse im Bergbau

Bedeutung und Einfluss der Zuflüsse in Bergbau -Tiefbau. Zuflussarten: offenes/geschlossenes System. Chemische Zusammensetzung der Zuflüsse. Untersuchungsmethoden der Zuflüsse. Prognose der Zuflussentwicklung.

Beispiele:

• Kupferschieferbergbau (Mansfelder Mulde, Sangerhäuser Revier)

• Spatbergbau

• Kohlenbergbau

• Salzbergbau (Deutschland, Polen, Ukraine, Russland, Kongo-Brazzaville)

VI. Prof. W. Stolz

Radioactive isotopes – fundamentals

Letzte Aktualisierung 26.5.99
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