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| Titel |
Modeling of matters removal from swampy catchment |
| VerfasserIn |
N. G. Inishev, L. I. Inisheva |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250035282
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| Zusammenfassung |
| This work shows the results of fixed study of geochemical conditions in the system of
landscape oligotrophic profile at Vasyugan mire spurs, and also we make an approach to
processes modelling of compounds removal from swampy catchment.
During investigation of symbolic model of chemical matters removal from the surface of
a catchment basin and their movement along the channel network it was taken into account
that removal of chemical elements during the period of spring flood and rain high waters
occur mainly with overland flow.
During calculation of dissolved matters movement the following admissions
take place: 1. The problem is solved at one-dimension set-up. Concentration of
investigated components is taken as averaged one along the flow cross section or effective
area of slope cross-section for overland runoff, i.e. it changes only lengthways
and in time. 2. It is considered that dissolved matters spread due to movement of
water and together with its particles. 3. Processes of water self-clarification are not
considered.
The model is calculated on the basis of discharge of the investigated ingredient, i.e. matter
mass moving through the given flow cross-section into time unit. This is the peculiarity of the
model. Matter removal together with water flow is determined if necessary. Everyday
impurity consumptions and its concentration can be estimated at the outlet at the moment of
time according to convolution integral.
Estimation of overland runoff and water inflow into the channel network is based on the
mathematic model of outflow formation from peatland areas which considers basic processes
carrying out at catchment and basin channel network.
Stored moisture estimation of snow cover is taken according to snow survey data before
snow melting. Everyday water supply to the surface of water collection was determined
according to the results of snow melt intensity estimation by the methods of temperature
coefficient and water yield from snow (A.G. Kovzel). All the estimations were
made taking into account layering unevenness of snow cover in deferent landscapes.
Stored water distribution in the limits of every landscape was approximated by
the curve of gamma distribution with parameters which are the results of snow
survey.
Everyday basin water yield was determined as difference between excesses of water
coming above usage for filling of its water retaining tank. The size of the water retaining tank
before start of snow melting depends on the basin wetting in the previous autumn. Autumn
river flow is taken as a degree of water retaining tank filling before the snow melt. It is
supposed that there is a process of water accumulation at slopes. Between theses
water supplies and overland runoffs there is a nonlinear link. Temporary melt water
detention, which comes from mire in swamp forest, is considered. Estimations
are made individually for field, forest and swamp parts of the basin of the river
Kljuch.
Estimation of HA removal from the surface of catchment of the river Kljuch is taken as an
example of model application. The results reveal possibilities of the given approach to
modeling of dissolved matters removal from the swampy area.
Acknowledgements: This research was supported by RFFR (No.No. 09-05-00235,
09-05-99007), Minister of education and science (No. 02.740.11.0325). |
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