1 / 16

Monitoring of the Agricultural Run-off in Latvia (1994-2005 )

Monitoring of the Agricultural Run-off in Latvia (1994-2005 ). Latvia - 6.4 million ha Population - 2.4 million Agricultural land - 2.4 million ha Drainage - 1.6 million ha. V iesturs Jansons

gyala
Download Presentation

Monitoring of the Agricultural Run-off in Latvia (1994-2005 )

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Monitoring of the Agricultural Run-off in Latvia (1994-2005) Latvia - 6.4 million ha Population - 2.4 million Agricultural land - 2.4 million ha Drainage - 1.6 million ha Viesturs Jansons Professor, Head of Department of Environmental Engineering and Water Management. Latvia University of Agriculture, e-mail viesturs.jansons@llu.lv Water balance: Precipitation 700 mm Evapotranspiration 450 mm Run-off 250 mm

  2. HELCOM PLC-4 (2000) Agriculture and water quality Baltic Sea 78% is input from agriculture 79 % is input from agriculure HELCOM political goal (1988) to decrease agricultural pollution by 50% has not been reached in most of countries.

  3. Bērze (368 ha, intensive farming, cereals and sugar beets, arable land 80-90 %.). Established 1968 /1994 Mellupīte (960 ha, average intensity, arable land 60-70 %). Established 1995. Vienziemīte (592 ha, low input agriculture, agr. land 79 %, arable land 4-5 %). Established 1948 /1994 3 point source pollution monitoring points (large animal farms): Vecauce (1000-2000 pigs, 30 ha slurry application field) Ogre (farm closed in 1992,heavily polluted territory) Bauska (8000 pigs, 50 ha slurry dumping field) 3 non-point source pollution points (small catchments): Auce (53 ha, intensive farming, cereals) Skriveri (890 ha, average intensity of farming) Bauska (750 ha, intensive farming, cereals, sugar beats) 3 non-point source pollution monitoring stations (sites) Monitoring network in Latvia

  4. Mellupite station, 960 ha Mellupite station, one plot 0,12 ha 5 treatments x 3 = 15 plots Mellupite station, 12 ha Vienziemite station, 592 ha Vienziemite station, 67 ha Berze station, 77 ha Berze station, 368 ha Soil, plant, nutrient and water relationships could be studied in the plot level, and nutrient leaching from soil with a different application of mineral or organic fertilisers for various crops might be examined in detail. Nutrient losses from arable land might be measured at a field level. Field scale run-off represents are integrated effect of farming practice, crop rotation, application of fertilisers etc. on the water quality. The integrated influence on nutrient run-off of variations in farming practices, erosion, soil and topography within the small catchment might be studied in a better way than in the field scale. In that scale emission rates (loads) that can contribute to the nutrient enrichment of surface water ecosystem can be examined. Monitoring scale (non point pollution)

  5. Small catchment station with inlets from plots and hydraulic structure. H. Structure – Crump weir Tipping buckets for plot measurements Surface run-off plot Weather station Mellupīte monitoring station(BEAROP Project 1994-2000)

  6. Hydraulic structure – V – shape Crump weirBerze station constructed 2006 – BSRP (WB and GEF project)

  7. Drainage field station Both surface and drainage run-off

  8. Measurement equipment - YSI data loggers, powered from solar panels. GSM data transfer with mobile phone from stations to university PC Continuous recording of data from sensors (every 3 min) with data loggers, automatical flow proportional water sampling in all measurement points Monitoring technology

  9. Ground water monitoring Shallow ground water monitoring since 2005: 10 wells in 3 monitoring sites are equipped with YSI mini data loggers (to, water level sensors) Depth of the wells is 4-6 m and 14-18 m (unconfined and confined aquifers) Water sampling (zonde) every 3 months

  10. 11.3 mg/l N/NO3 (Nitrate Directicve) Monitoring results 1994-2005Average concentrations of the nitrogen in run-off

  11. 11.3 mg/l N/NO3 (Nitrate Directicve) Monitoring results 1994-2005 Trends of the nitrogen concentrations in run-off 1994 2005

  12. Monitoring results 1994-2005 Pollution load (Ntot) from agricultural land in Latvia Wastewater One population equivalent 13g of Ntot day-1 or 4,7 kg Ntot year-1 Load = Concentration x discharge

  13. Measures to decrease pollution? EU Nitrate directive - Action plans in VZ Rural development plan - Agro-environmental Schemes • Green land 50% (30%) • Nutrient balances in farms • Buffer zones • Manure storage

  14. Buffer Zones

  15. Buffer Zones Results of the Latvia Agro-environmental Scheme, 2005

  16. Improvement of Manure Storage in the VZ.Results of Latvia Agro-environmental Scheme, 2005 BSRP project - 3 storages (1 under construction). Investments 50-100%.

More Related