Essays about: "TWI"

Showing result 16 - 20 of 21 essays containing the word TWI.

  1. 16. The Origin of Streams : Stream cartography in Swiss pre alpine headwater

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Oskar Sjöberg; [2016]
    Keywords : Temporary stream; Stream cartography; Drainage density; Hydrological connection; Topographic wetness index; Upslope accumulated area; Stream head; Headwater catchment;

    Abstract : Temporary streams have received undeservedly little scientific attention and as a result their role in hydrological, biogeochemical and ecological processes is not yet fully understood. The ultimate goal of the research was to gain a better understanding of the temporary stream network and the processes that control it and determine how the active and connected stream length change with catchment wetness conditions to find simple methods to map seasonal and event-based changes in temporary flowing stream networks. READ MORE

  3. 17. Topografins inverkan på markvattenhalten i ett jordbruksdominerat avrinningsområde

    University essay from SLU/Dept. of Soil and Environment

    Author : Olof Haraldsson; [2015]
    Keywords : topografi; jordbrukslandskap; markvattenhalt; dränering; avrinningsområde;

    Abstract : Topography is an important parameter for catchment hydrology, since it is a driver for water flow. Moreover, topography serves as a basis for hydrological models, e.g. ‘Top-model’, which is based on a topographical wetness index (TWI). READ MORE

  4. 18. Groundwater Vulnerability Assessment for Railroad Construction in Stockholm, Sweden, using Spatial Multi Criteria Analysis.

    University essay from KTH/Mark- och vattenteknik

    Author : Irina Tsoy; [2015]
    Keywords : Groundwater Vulnerability; GIS; MCA; Railroad Railway Construction; Stockholm;

    Abstract : The environmental impact of transportation construction, operation and maintenance is of critical importance. Therefore it is vital to carry out a groundwater vulnerability assessment for transportation projects at an early stage. READ MORE

  5. 19. Soil moisture modelling using TWI and satellite imagery in the Stockholm region

    University essay from KTH/Geodesi och geoinformatik

    Author : Jan Haas; [2010]
    Keywords : TWI; TVDI; soil moisture;

    Abstract : Soil moisture is an important element in hydrological land-surface processes as well as land atmosphere interactions and has proven useful in numerous agronomical, climatological and meteorological studies. Since hydrological soil moisture estimates are usually point-based measurements at a specific site and time, spatial and temporal dynamics of soil moisture are difficult to capture. READ MORE

  6. 20. Topography, soil carbon-nitrogen ratio and vegetation in boreal coniferous forests at the landscape level

    University essay from SLU/Dept. of Forest Soils

    Author : Guillermo Chaminade; [2005]
    Keywords : C N ratio; TWI; soil properties; vegetation; landscape;

    Abstract : This thesis was developed with the main objective of assessing the mutual influence of three of the main factors taking part in the ecological processes of the boreal forest: topography and the hydrological fluxes related to it, C/N ratio in the forest soil, and vegetation composition. The interaction between these factors has not been the main focus in any study of this kind before, although in numerous reports these variables and their role in the forests have been assessed. READ MORE