SUMMARY Assessing the spatial and temporal heterogeneity in subsurface water storage has strong societal environmental implications, as it is key to assess availability for ecosystem society. This challenge especially significant mountainous areas, where local population totally depends on springwater a freshwater resource, while dynamics complex evaluate because exhibits spatiotemporal heterog...

Differences in hydrologic response across the rain-snow transition in the southern Sierra Nevada were studied in eight headwater catchments – the Kings River Experimental Watersheds – using continuous precipitation, snowpack, and streamflow measurements. The annual runoff ratio (discharge divided by precipitation) increased about 0.1 per 300 m of mean catchment elevation over the range 1,800-2,...

Within the southeast Canada and northeast USA region, a peak in sulphate (SO4 ) concentration has been reported for some streams following periods of substantial catchment drying during the summer months (ON, Canada; VT, NH and NY, USA). However, it is currently unclear if a SO4 2response to seasonal drying is widespread across the broader region, or to what extent the level of response varies ...

Landform evolution modelling (LEM) provides an avenue for simulating how a landscape may evolve over extended time periods of thousands years. CAESAR-Lisflood LEM which includes hydrologic model (TOPMODEL) and hydraulic (Lisflood) can be used to assess the proposed final landform morphology mine site by would 1000-year period. The accuracy future simulations depends on calibration validation pa...

Nitrate and dissolved organic carbon (DOC) concentrations during a summer storm for a forested catchment in the Adirondack Mountains displayed a clear separation in trajectories and timing of maximum values. Nitrate concentrations peaked early on the rising limb of the hydrograph, whereas DOC concentrations gradually increased through the rising limb with maximum concentrations following the di...

Controls of stream water NO3 in mountainous and forested catchments are not thoroughly understood. Longterm trends in stream water NO3 are positive, neutral and negative, often apparently independent of trends in N deposition. Here, time series of NO3 in four small acid-sensitive catchments in southern Norway were analysed in order to identify likely drivers of long-term changes in NO3. In two ...

Papers published in Hydrology and Earth System Sciences Discussions are under open-access review for the journal Hydrology and Earth System Sciences Abstract Predicting discharge in ungauged catchments requires knowledge on the distribution and spatial heterogeneity of hydrological soil properties. Because hydrological soil information is not available on a European scale, we reclassified the S...

estimate of sediment load is required in a wide spectrum of water resources engineering problems. the nonlinear nature of suspended sediment load series necessitates the utilization of nonlinear methods to simulate the suspended sediment load. in this study artificial neural networks (anns) are employed to estimate daily suspended sediment load. two different ann algorithms, multi layer percept...

Tropical Africa is affected by intense land-use change, particularly forest conversion to agricultural land. In this study, the stream discharge of four small headwater catchments located within an area of 6 km in western Kenya was examined for 2 years (2007 and 2008). The four catchments cover a degradation gradient ranging from intact forest to agricultural land under maize cultivation for 5,...