These four satellite gauge QPEs are statistically evaluated over the Huaihe River basin during 2003 2012 and applied into the distributed Variable Infiltration Capacity (VIC) model to assess hydrologic utilities.
It also demonstrates the usefulness of combined chemical and isotopic methods in hydrologic investigations, especially the utility of the deuterium excess parameter in quantifying the relative contributions of various source components to the stream flow.
The database includes major road and rail networks, major hydrologic drainage systems, major utility networks (cross-country pipelines and communication lines), all major airports, elevation contours (1000 foot ft), with 500ft and 250ft supplemental contours), coastlines, international boundaries, and populated places NGA-VMap0 , 1997). NGA-VMap0 , 1997
While previous studies have shown the utility of using hydrologic measurements combined with inverse modeling techniques for tomography of physical properties including hydraulic conductivity, these methods have seldom been used to image reactive geochemical heterogeneities.
Using the uncalibrated Duke Coupled surface-groundwater Hydrology Model (DCHM), the value and utility of the downscaled products for hydrologic offline simulations are demonstrated through comparative analysis of the sensitivity of water and energy budgets in mountain watersheds for four water-years (2007/10 2011/09) including a severe drought and several flood events.
Further investigation of such issues is needed for scientists and public health officials to determine fully the utility and limitations of hydrologic predictions.
This limitation significantly reduces the utility of the TI approach in distributed hydrologic models because spatial variability within the watershed, including snowpack and snowmelt, is usually the primary reason for selecting a distributed model.
The utility of the BCM to assess unimpaired hydrologic conditions for California relies on thoroughly characterizing underlying geology based in part on the use of streamgage data to calibrate the hydrologic balance between recharge and runoff.
The utilities and potentialities of GIS in hydrogeology and hydrologic modeling are only at its beginning, but many successful applications have already started to develop (Bhasker et al. 1992; Gossel et al. 2004) and GIS has more scope in groundwater hydrologic modeling to develop better plans and pragmatic policy.
The utility of the combined approach is contingent on the availability of hydrologic and chemical monitoring data for calibrating groundwater and LR models.
