abstract spatial variability of soils makes difficult analysis of soil water flow phenomena especially in a large area such as a watershed. using scaling methods is a solution in variability problems. the objective of this study was to investigate the effect of the non-linear variability on performance of the scaling methods of richards’ equation for modeling infiltration in a watershed. the me...

in iran, most mountainous watersheds do not have enough hydrometery stations and defective stations have sparse data. because of limited availability of hydrologic data, watershed modeling plays a crucial role in development of local resources. in this study, swat was applied to simulate runoff in marun dam (idanak) watershed, a sub-basin of marun catchment. calibration and sensivity analyses w...

The 2009 Typhoon Morakot triggered numerous landslides in southern Taiwan, and the landslide ratios Ailiao Tamali river watershed were 7.6% 10.7%, respectively. sediment yields from that deposited gullies narrow reaches upstream of watersheds dominated recovery evolution 2010 to 2015. Rainfall records annual inventories 2005 2015 used analyze identify hotspots. time after was estimated as 5 yea...

Abstract Soil wearing away or erosion is a chief agent of land loss in agricultural and regarded worldwide as serious environmental hazard. This study performed watershed prioritization using morphometric parameters based on fuzzy best worse method (F-BWM) GIS integration for Gusru Watershed, India. prioritizes sub-watersheds the area from viewpoint soil five major i.e., stream frequency ( F s ...

Mountaintop removal coal mining (MTM) is a form of surface mining where ridges and mountain tops are removed with explosives to access underlying coal seams. The crushed rock material is subsequently deposited in headwater valley fills (VF). We examined how this added water storage potential affects streamflow using a paired watershed approach consisting of two sets of mined and unmined watersh...

The SPAtially Referenced Regressions On Watershed attributes (SPARROW) model was used to perform an assessment of surface-water nutrient conditions and to identify important nutrient sources in watersheds of the Pacific Northwest region of the United States (U.S.) for the year 2002. Our models included variables representing nutrient sources as well as landscape characteristics that affect nutr...

Quantification of hydrologic model prediction uncertainty for various flow quantiles is great importance water resource planning and management. Thus, this study designed to assess the effect subbasin spatial scale on hydrological different quantiles. The Soil Water Assessment Tool (SWAT), a geographic information system (GIS) interfaced model, was used in study. Here, variations within sub-bas...

In this paper we consider the scheduling of periodic and parallel rigid tasks. We provide (and prove correct) an exact schedulability test for Fixed Task Priority (FTP) Gang scheduler sub-classes: Parallelism Monotonic, Idling, Limited Gang, and Limited Slack Reclaiming. Additionally, we study the predictability of our schedulers: we show that Gang FJP schedulers are not predictable and we iden...

Intensifying permafrost thaw alters carbon cycling by mobilizing large amounts of terrestrial substrate into aquatic ecosystems. Yet, few studies have measured fluxes and constrained drivers ecosystem balance across heterogeneous Arctic landscapes. Here, we characterized hydrochemical landscape controls on fluvial cycling, quantified fluxes, estimated contributions to 33 watersheds in four ecor...