Search for dissertations about: "ditch"

Showing result 1 - 5 of 9 swedish dissertations containing the word ditch.

  2. 1. Moats in ancient Palestine

    Author : Dag Oredsson; Uppsala universitet; []
    Keywords : HUMANIORA; HUMANITIES; Religion; Bible; Hebrew Bible; Old Testament; archaeology; Ancient Near East; Palestine; Egypt; Assyria; Syria; Babylonia; Israel; Jordan; Moab; Edom; Ammon; Aramaeans; fortifications; defence; rampart; glacis; city wall; Early Bronze Age; Middle Bronze Age; Late Bronze Age; Iron Age; Jericho; Hazor; Jezreel; fosse; ditch; moat; Religionsvetenskap Teologi; Religion Theology; Religionsvetenskap Teologi; gamla testamentets exegetik; Old Testament Exegesis;

    Abstract : This is the first in-depth study of moats as a part of fortifications in Palestine from prehistoric times until the end of the Iron Age. The author proposes a relation between the shape of a moat and its function. READ MORE

  4. 2. Soil Erosion and Mass Movement in Agricultural Drainage Ditches

    Author : Daniel Avilés; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Agricultural drainage ditches degrade over time. This degradation is often due to soil erosion, which can cause mass movement (bank failure) when the toe of the bank is eroded or the slope of the bank is too steep. Soil eroded or displaced by mass movement is either transported by the flowing water or deposited in the drainage ditch. READ MORE

  5. 3. Environmental impact of peat mining : Development of storm water treatment methods

    Author : Bjørn Kløve; Avdelningen för Teknisk vattenresurslära; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; geographical and geological engineering; Hydrogeology; drainage artificial floodplaines; phosphorus; suspended solids; nitrogen; erosion; peat mining; peak runoff controll; sedimentation; water treatment; water resources; hydrology; hydraulics; Hydrogeologi; teknisk geologi; teknisk geografi; Geophysics; physical oceanography; meteorology; Geofysik; fysisk oceanografi; meteorologi;

    Abstract : Drainage of peatlands increases the transport of suspended solids (SS) and the leaching of nutrients to downstream receiving waters. Increased settling of peat and eutrophication of lakes has been noted in many studies downstream from peat mines. READ MORE

  6. 4. Particulate phosphorus accumulation and net retention in constructed wetlands receiving agricultural runoff : Critical analysis of factors affecting retention estimates

    Author : Karin Johannesson; Karin Tonderski; Stefan Weisner; Uno Wennergren; Ben Surridge; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Phosphorus retention; constructed wetlands; agriculture; sampling strategy;

    Abstract : Övergödning är ett allvarligt miljöproblem, som bland annat orsakar omfattande blomningar av alger och blågrönbakterier. I söt- och brackvatten är fosfor ofta det mest begränsande näringsämnet för dessa organismer, varför en minskning av fosfortillförseln är nödvändig för att nå förbättringar. READ MORE

  7. 5. The greenhouse gas balance of drained forest landscapes in boreal Sweden

    Author : Cheuk Hei Marcus Tong; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Forest drainage has been extensively used to facilitate forest growth in Fennoscandinavia. However, its impact on the ecosystem carbon (C) and greenhouse gas (GHG) balances is limited, particularly in the large area of hemiboreal and boreal Sweden. READ MORE