Lakes catchment

The sedimentation flux was considered to be affected by two factors direct deposition on the lake and erosion from the ground in the lake catchment. The fallout of Cs was found to be negligible compared with the sedimentation flux of Cs in lake Shinji during the 1990s. Therefore, the present sedimentation can be attributed to the... 

The fact that lake SO/ concentrations have declined less than anticipated based on the decline in SO/ deposition indicates that either processing of so/ within the lakes catchments has changed or processing within the lake itself has changed or both. However, the latter can be ruled out because the mass transfer coefficient for S04 in the study lakes has remained at 0 m/yr (+/- 0.05), i.e., the loss (or production) of SO/ within the lakes is insignificant relative to the flux of S04 through the lake (Dillon, unpub. 

Dillon, P.J. and LaZerte, B.D. (1992). Response of the Plastic Lake catchment, Ontario to reduced sulphur deposition. Environ. Pollut., 77, 211-217. 

Lake sediment records on climate change of the Qinghai Lake catchment in Southwest China based on wavelet analysis... 

Based on the environmental proxies grain-size, TOC, CaC03 and magnetic susceptibility with wavelet analysis and AMS C datings, we have identified the climate cycle of Qinghai Lake catchment during the Holocene. The results are follows ... 

Fig. 3 The hydrological alteration of the river network of the Upper Rhone catchment in Switzerland that drains into Lake Geneva (data Swiss Federal Hydrological Office)...

Matias NG, Boavida MJ (2005) Effects of catchment development on the trophic status of a deep and a shallow reservoir in Portugal. Lake Reserv Manage 21 350-360... 

Hultberg H, Iverfeldt A, Lee Y-H. 1994. Methyhnercury input/output and accumulation in forested catchments and critical loads for lakes in Southwestern Sweden. In Watras C J, Huckabee. JW, editors. Mercury pollution, integration and synthesis. Boca Raton (FL) Lewis Publishers, CRC Press, Inc. 

The effectiveness of nitrate addition to control sulfide has been investigated in a sewer network in the Lake Balaton catchment, Hungary (Jobbagy et al., 1994). Figure 6.6 shows the effect of nitrate addition on the H2S concentration in the headspace of a manhole located downstream of the station where nitrate was added. The importance of the anoxic removal of organic matter at the inlet... 

With respect to aquatic ecosystems, a receptor is thus characterized as a like, a river or a sea. The major receptor that we will consider here is a lake, including catchment (see small catchment studies in Chapter 18). The reason is that the suggested models are all relatively simple and based on the assumption that the water compartment is homogeneously mixed. Much more complicated models are necessary to calculate... 

Net uptake of heavy metals is due to the removal of heavy metals in crops or trees in the catchment and/or in aquatic plants and fish in a lake. Weathering relates to the... 

The Rhine River above Lake Constance (alpine and prealpine catchment area) averages the following composition ... 

Case Study Chemical Weathering of Crystalline Rocks in the Catchment Area of Acidic Ticino Lakes, Switzerland... 

Fig. 5.20 gives the water composition of four lakes at the top of the Maggia valley in the southern alps of Switzerland. Although these lakes are less than 10 km apart, they differ markedly in their water composition as influenced by different bedrocks in their catchments. All lakes are at an elevation of 2100 - 2550 m. The small catchments are characterized by sparse vegetation (no trees), thin soils and steep slopes. 

Comparison of water composition of four lakes influenced by different bedrocks in their catchments. Drainage areas of Lake Zota and Lake Cristallina contain only gneiss and granitic gneiss that of Lake Piccolo Naret contains small amounts of calcareous schist that of Lake Val Sabbia exhibits a higher proportion of schist. 

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