Recent proxy measurements reveal that subglacial lakes beneath modern ice sheets periodically store and release large volumes of water, providing an important but poorly understood influence on contemporary ice dynamics and mass balance. This is because direct observations of how lake drainage initiates and proceeds are lacking. Here we present physical evidence of the mechanism and geometry of...

Drainage canals associated with logging and agriculture dry out organic soils in tropical peatlands, thereby threatening the viability of long-term carbon stores due to increased emissions from dec...

The operating quality of reclamation drainage and irrigation systems depends on the condition their main elements. elements are canals with various profiles, ranging from rectangular to parabolic. most widespread in land a trapezoidal profile. At same time, it is possible note that natural production characteristics quite diverse, this issue especially relevant for geometric parameters canals. ...

Abstract Globally, there are millions of kilometres drainage ditches which have the potential to emit powerful greenhouse gas methane (CH 4 ), but these emissions not reported in budgets inland waters or drained lands. Here, we synthesise data show that spanning a global latitudinal gradient and across different land uses large quantities CH atmosphere. Area-specific comparable those from lakes...

The corrosion degradation of the steel sheet pile material accelerates in recent years. extremely accelerated induces thickness loss and decreases mechanical characteristics. It is essential to evaluate corroded situations for design maintenance infrastructures. In this study, spatial characteristics service canals were evaluated by geostatistics with variogram kriging. experimental procedures,...

Pesticide use in agriculture can cause undesirable effects to the natural environment as well as to humans. A field trial to determine residues of 2,4-D and paraquat in the ricefield soil and surface water of the drainage canals in the Kerian district of Perak, Malaysia, was conducted during 2006/2007. Analyses of 2,4-D and paraquat in the soil and water samples were carried out using a high pe...

Watershed modeling has become an important tool for researchers. Modeling nitrate transport within drainage networks requires quantifying the denitrification within the sediments in canals and streams. In a previous study, several of the authors developed an equation using a term called a mass transfer coefficient to mathematically describe sediment denitrification. This equation takes into acc...