Essays about: "Preferential water flow"

Showing result 6 - 10 of 12 essays containing the words Preferential water flow.

  1. 6. Water flow and solute transport through a frozen clay soil

    University essay from SLU/Dept. of Soil and Environment

    Author : Anna Elena Hess; [2017]
    Keywords : pesticides; freezing; thawing; leaching; soil;

    Abstract : Freezing and thawing of soil affect water flow in the vadose zone for instance by altering soil structure or ice blocking parts of the pore system. Changes in soil hydraulic properties impact solute transport and therefore the risk that pesticides and other agrochemicals are transported towards groundwater. READ MORE

  3. 7. Restriction of manure application on high phosphorus soils - Is current research supporting a restriction and what measures are in effect in different European countries?

    University essay from Lunds universitet/Miljövetenskaplig utbildning

    Author : Oscar Hassby; [2016]
    Keywords : Manure; agriculture; phosphorus; leaching; lysimeter; column; manure legislation; meta-analysis; Earth and Environmental Sciences;

    Abstract : The Swedish Water Authorities have proposed a measure to reduce phosphorus losses by restricting manure application on soils with high levels of plant available phosphorus. The aim of this thesis was to investigate if leaching of phosphorus will decrease if the measure is implemented, if the effect is restricted to soils with high phosphorus content and if other European countries have implemented similar measures. READ MORE

  4. 8. Effects of trees and termite nests in agroforestry parklands on preferential water flows : image analysis of soil profiles after rain simulations and dye experiments

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Addisu Almaw Semeneh; [2012]
    Keywords : Preferential water flow; macro pores; infiltration capacity; termites; Vittelaria paradoxa; tropics; Burkina Faso; brilliant blue tracer;

    Abstract : Water scarcity is a critical problem in semi-arid tropics of Burkina Faso. Agroforestry parklands, a land use where scattered trees are maintained with annual crops, is commonly practiced by farmers in which termite nests are integral components of the system. READ MORE

  5. 9. Quantifying hillslope flowpaths and residence times of water implied by the transmissivity feedback hypothesis : an application of the MIPS concept

    University essay from SLU/Dept. of Aquatic Sciences and Assessment

    Author : Ulrich Tschiesche; [2012]
    Keywords : transmissivity feedback; hillslope model; particle tracking; tracer experiment; runoff processes;

    Abstract : The Multiple Interacting Pathways (MIPS) model is a physically based approach for simulating groundwater flow within a hillslope. The MIPS model covers the soil heterogeneities and preferential flow pathways by representing water as particles with a specific volume and through application of velocity distributions and transition probability matrices. READ MORE

  6. 10. Simulations of drainage and phosphorus leaching with the ICECREAM model for 15 years at Mellby experimental field

    University essay from SLU/Dept. of Soil and Environment

    Author : Jian Liu; [2010]
    Keywords : drainage; phosphorus leaching; ; ICECREAM model; Mellby experimental field;

    Abstract : Phosphorus (P) losses from agricultural fields have been recognised as one of the mostimportant sources of P causing eutrophication in water bodies. Water transport in soil playsan important role in P leaching from drained fields. READ MORE