Comparison of subsurface and surface runoff phosphorus transport rates in alluvial floodplains
نویسندگان
چکیده
منابع مشابه
Subsurface transport of phosphorus in riparian floodplains: influence of preferential flow paths.
For phosphorus (P) transport from upland areas to surface water systems, the primary transport mechanism is typically considered to be surface runoff with subsurface transport assumed negligible. However, certain local conditions can lead to an environment where subsurface transport may be significant. The objective of this research was to determine the potential of subsurface transport of P al...
متن کاملSource-related transport of phosphorus in surface runoff.
Continual application of mineral fertilizer and manures to meet crop production goals has resulted in the buildup of soil P concentrations in many areas. A rainfall simulation study was conducted to evaluate the effect of the application of P sources differing in water-soluble P (WSP) concentration on P transport in runoff from two grassed and one no-till soil (2 m(2) plots). Triple superphosph...
متن کاملDivergence and flow direction as indicators of subsurface heterogeneity and stage-dependent storage in alluvial floodplains
Assuming homogeneity in alluvial aquifers is convenient, but limits our ability to accurately predict stream-aquifer interactions. Research is needed on (i) identifying the presence of focused, as opposed to diffuse, groundwater discharge/recharge to streams and (ii) the magnitude and role of large-scale bank and transient storage in alluvial floodplains relative to changes in stream stage. The...
متن کاملApproximating phosphorus release from soils to surface runoff and subsurface drainage.
Phosphorus application in excess of crop needs has increased the concentration of P in surface soil and runoff and led many states to develop P-based nutrient management strategies. However, insufficient data are available relating P in surface soil, surface runoff, and subsurface drainage to develop sound guidelines. Thus, we investigated P release from the surface (0-5 cm depth) of a Denbigh ...
متن کاملEffects of hydrology and field management on phosphorus transport in surface runoff.
Phosphorus (P) losses from agricultural landscapes arise from the interaction of hydrologic, edaphic, and management factors, complicated by their spatial and temporal variability. We monitored sites along two agricultural hillslopes to assess the effects of field management and hydrology on P transfers in surface runoff at different landscape positions. Surface runoff varied by landscape posit...
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ژورنال
عنوان ژورنال: Agriculture, Ecosystems & Environment
سال: 2011
ISSN: 0167-8809
DOI: 10.1016/j.agee.2011.04.006