GIS

Web GIS-based simulation of water fluxes in the Miyun catchment area

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Description: 
Change of land use and agricultural management, combined with severe droughts during the last two decades, are the main reasons for a strong decrease of water quality and quantity in the Miyun reservoir (China). Due to semi-arid monsoon climate, episodic water fluxes have to be considered adequately in an integrated water resources management in the total catchment area. To get insight into runoff generation processes, sediment and nutrient source areas and transfer dynamics, a monitoring approach was established in the Miyun catchment area spanning from plot measurements with weighable gravitation lysimeters and in situ measurements to a subcatchment scale of approx. 10 km2. One of these subcatchments (Sheyuchuan) was selected to adapt the methodologies to the regional runoff pattern using the web GIS-based modeling tool STOFFBILANZ. Calibration of the daily runoff modeling is based on the lysimeter observations from Shixia station and runoff observations in Sheyuchuan subcatchment for the reference year 2011. Despite the fact that the climatic water balance in the region is negative, the precipitation event on 24 July 2011 with a rainfall of 107 mm caused a significant leachate at the lysimeter. The daily modeling for the lysimeter core by the FAO-ETc-adj approach showed a similar deep percolation and a similar distribution of evapotranspiration for the year considered. In the next step, the calibrated model was applied to the subcatchment Sheyuchuan to compare the results of direct runoff and groundwater runoff (deep percolation) with the runoff observations at the weir. Deep percolation was extremely small (1.7 mm yr-1), and direct runoff was 26.9 mm yr-1 in 2011. In comparison to the monitoring results at the weir, a disagreement in the quantity of runoff was found between the observation on the one hand and the simulation on the other hand, which can be explained by water storage in reservoirs for irrigation purposes. Additionally, the water fluxes in the total catchment area were simulated at meso-scale, obtaining a good correlation with observed values.

Comments

paritosh singh Chauhan
thanks a lot for this paper, it seems to be interesting, I want to discuss on some aspects of this, may I get your id for hangout, I will thoroughly go through the paper, and will discuss on the same. My mail Id is as follows "paritosh219@gmail.com"
Stefan Halbfass
There is also a web site : http://stoffbilanz.de/s1/index.php?home=m1&lang=eng&

By the way, actually we are using the Stoffbilanz model in a research project in South Africa. Unfortuneatley there is no publication yet. If you need information about it, please contact me directly.
Alisha Voght
We never used STOFFBILANZ before. I will come back to you after reading the paper if I have some problems. Thanks Stefan for the paper.
Stefan Halbfass
There is also a quite long list of publications :
http://galf-dresden.de/galf/index.php/publikationen/?lang=en
Stefan Halbfass
There is also a web site : http://stoffbilanz.de/s1/index.php?home=m1&lang=eng&

By the way, actually we are using the Stoffbilanz model in a research project in South Africa. Unfortuneatley there is no publication yet. If you need information about it, please contact me directly.
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