ingenue
发表于 2025-3-26 20:56:51
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确定方向
发表于 2025-3-27 03:40:20
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鬼魂
发表于 2025-3-27 08:33:19
Historical background by the name of Leo Africanus, first spoke of a great lake situated in a desert region and fed by underground water coming from an arm of the Nile. He suggested that the River Niger originated from this lake.
新奇
发表于 2025-3-27 11:25:50
Paleolimnology of an upper quaternary endorheic lake in Chad basin73), but was completed by diatom (Servant-Vildary 1978) and pollen analysis (Maley 1980) from lacustrine deposits. The main purpose was to reconstruct the paleoenvironments of the quaternary lakes in order to determine climatic variations. The results are incorporated into a more comprehensive progr
责怪
发表于 2025-3-27 16:58:41
The lacustrine environment basin which has an outlet towards the Chad Bahr-el-Ghazal above the altitude of 283 m (Fig. I). Lake waters rise above this point only after several consecutive high river floods and then flow towards the lower regions in the northern part of the basin. Around this level, the lake looks like a smal
处理
发表于 2025-3-27 21:30:58
Physical and chemical characteristics of the watersed both spatially and temporally. It is thus very difficult to describe the environment. We have subdivided the lake into a certain number of regions and considered parameters such as water turbulence, temperature, oxygenation and transparency as well as the chemical characteristics of the water. Th
毕业典礼
发表于 2025-3-27 22:16:01
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Organonitrile
发表于 2025-3-28 05:24:05
The aquatic vegetation of Lake Chad The species composition and the location of the populations were determined and some observations on the aquatic vegetation of the then reduced lake area were made by Chouret and Lemoalle (1974), Fotius (1974), Fotius and Lemoalle (1976). These observations follow the changes in the lake basin whic
beta-carotene
发表于 2025-3-28 06:32:39
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结构
发表于 2025-3-28 12:52:41
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