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High temporal resolution monitoring in a wet grassland (Oxfordshire, UK) for estimation of evaporative loss

100%

Mould D. J.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

2007

nr 38

127-137

A strong diurnal regime in water levels (maximum range 10 cm) was discovered by pressure transducers programmed to measure water levels at high frequency. The wetland site is a restored wet grassland floodplain in a clay basin. These water table fluctuations are used to estimate evaporative loss from the soil profile assuming constant head recovery, and compared to actual evaporation measurements derived from eddy correlation-energy budget methods. The former performed well on dry days with a strong diurnal regime, and information gained from high temporal resolution monitoring improved hydrological understanding of the wetland considerably.

Seasonal behavior and spatial fluctuations of groundwater levels in long-term irrigated agriculture: the case of a sugar estate

58%

Dinka M. O., Loiskandl W., Ndambuki J. M.

Polish Journal of Environmental Studies

2013

tom 22

nr 5

This paper presents results on the spatial and temporal fluctuations of the groundwater table depth (GWTD) at Wonji-Shoa Sugar Estate (WSSE). Accordingly, spatial maps of GWTD were produced in a GIS (ArcView 3.3) environment from 35 groundwater monitoring piezometers. Results of the study revealed that WSSE, after nearly 60 years of irrigation, is experiencing a serious waterlogging problem. The groundwater (GW) depth is extremely shallow (<1 m below ground) in most of the piezometers throughout the entire season and showed great spatio-seasonal variability. The rate of annual increment of GW rise, coupled with seasonal fluctuation, has obvious repercussions and grave consequences for the sustainability of WSSE in particular and to the region in general. Unless the potential causes for the rise of GWTD are identified soon and feasible corrective measures for mitigating GW rise are introduced, severe crises in the region are inevitable.

Ograniczanie wyników

1 Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

1 Polish Journal of Environmental Studies

1 Dinka M. O.

1 Loiskandl W.

1 Mould D. J.

1 Ndambuki J. M.

1 2013

1 2007

Wyniki wyszukiwania

High temporal resolution monitoring in a wet grassland (Oxfordshire, UK) for estimation of evaporative loss

Seasonal behavior and spatial fluctuations of groundwater levels in long-term irrigated agriculture: the case of a sugar estate