Stable Isotope Mass Balance Method to Find the Water Budget of a Lake

Vehbi ÖZAYDIN

Makale detayları

Stable Isotope Mass Balance Method to Find the Water Budget of a Lake

Yazarlar:

Vehbi ÖZAYDIN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2001 Vol.25 Issue 4, pp.329-344

Belge Tipi:

Makale

Yayın Tarihi:

3/2001

Belge Dili:

Türkçe

Document ID (Org No.):

2000745246

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160

Özet:

 

Determination of a lake water budget is essential for water  resources engineers.  Some of these elements, such as surface inflow,  precipitation, evaporation, surface outflow, and variation of lake  level, can be measured easily at the site.  However, it is difficult to  determine the groundwater inflow and outflow.  Although these  quantities could be calculated as a residual term of the water budget  equation, they yield information only on absolute contributions of  groundwater flow.  At least one additional equation is needed to solve  the unknowns separately.  Stable isotopes (oxygen-18 and deuterium),  exist in water naturally,  provide additional equations, and  simultaneous solutions of these equations make it possible to quantify  the groundwater inflow into and the outflow from the lake.  In this paper,  the stable isotope mass balance method, which is an expensive  technique, together with the conventional water budget method are applied  to Mogan Lake, located south of Ankara, Turkey, to determine the  groundwater contribution to the lake.  It was found that the average  groundwater inflow to Mogan Lake is 20.42 million m3 \pm 17.22% while  the average groundwater outflow is 16.44 million m3 \pm 24.95% for the  1994 water year.

 

Determination of a lake water budget is essential for water  resources engineers.  Some of these elements, such as surface inflow,  precipitation, evaporation, surface outflow, and variation of lake  level, can be measured easily at the site.  However, it is difficult to  determine the groundwater inflow and outflow.  Although these  quantities could be calculated as a residual term of the water budget  equation, they yield information only on absolute contributions of  groundwater flow.  At least one additional equation is needed to solve  the unknowns separately.  Stable isotopes (oxygen-18 and deuterium),  exist in water naturally,  provide additional equations, and  simultaneous solutions of these equations make it possible to quantify  the groundwater inflow into and the outflow from the lake.  In this paper,  the stable isotope mass balance method, which is an expensive  technique, together with the conventional water budget method are applied  to Mogan Lake, located south of Ankara, Turkey, to determine the  groundwater contribution to the lake.  It was found that the average  groundwater inflow to Mogan Lake is 20.42 million m3 \pm 17.22% while  the average groundwater outflow is 16.44 million m3 \pm 24.95% for the  1994 water year.

Makale detayları

Stable Isotope Mass Balance Method to Find the Water Budget of a Lake

Yazarlar: Vehbi ÖZAYDIN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Engineering and Environmental Sciences 2001 Vol.25 Issue 4, pp.329-344

Belge Tipi: Makale

Yayın Tarihi: 3/2001

Belge Dili: Türkçe

Document ID (Org No.): 2000745246

Sıklık: Üç Yıllık

eISSN: 1303-6157

pISSN: 1300-0160

Sayı

Yazarlar:

Vehbi ÖZAYDIN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2001 Vol.25 Issue 4, pp.329-344

Belge Tipi:

Makale

Yayın Tarihi:

3/2001

Belge Dili:

Türkçe

Document ID (Org No.):

2000745246

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160