Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 545163
Title Agrohydrological analysis of groundwater recharge and land use changes in the Pampas of Argentina
Author(s) Kroes, Joop; Dam, Jos van; Supit, Iwan; Abelleyra, Diego de; Verón, Santiago; Wit, Allard de; Boogaard, Hendrik; Angelini, Marcos; Damiano, Francisco; Groenendijk, Piet; Wesseling, Jan; Veldhuizen, Ab
Source Agricultural Water Management 213 (2019). - ISSN 0378-3774 - p. 843 - 857.
DOI https://doi.org/10.1016/j.agwat.2018.12.008
Department(s) Alterra - Soil, water and land use
WIMEK
Soil Physics and Land Management
Water and Food
Water Systems and Global Change
PE&RC
Alterra - Earth informatics
Soil Geography and Landscape
Alterra - Sustainable soil management
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) Argentina - Capillary rise - Groundwater recharge - Land use - Pampas - Soybean - SWAP - WOFOST
Abstract

This paper studies the changes of groundwater, climate and land use in the Pampas of Argentina. These changes offer opportunities and threats. Lowering groundwater without irrigation causes drought and successive crop and yield damage. Rising groundwater may alleviate drought as capillary rise supports root water uptake and crop growth, thus narrowing the difference between potential and actual yields. However, rising groundwater may also limit soil water storage, cause flooding in metropolitan areas and have a negative impact on crop yields. Changing land use from continuous soy bean into crop rotations or natural vegetation may decrease groundwater recharge and thus decrease groundwater levels. In case of crop rotation however, leaching of nutrients like nitrate may increase. We quantified these impacts using integrated dynamic crop growth and soil hydrology modelling. The models were tested at field scale using a local dataset from Argentina. We applied distributed modelling at regional scale to evaluate the impacts on groundwater recharge and crop yields using long term weather data. The experiments showed that threats arise from continuous monotone land use. Opportunities are created when a proper balance is found between supply and demand of soil water using a larger differentiation of land use. Increasing the areas of land use types with higher evapotranspiration, like permanent grassland and trees, will contribute to a more stable hydrologic system with more water storage capacities in the soil system and lower groundwater levels. Modelling tools clearly support the evaluation of the impact of land use and climate change on groundwater levels and crop yields.

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