马达加斯加南部半干旱区水资源

K. Mori
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引用次数: 0

摘要

本文在实地调查的基础上,根据马达加斯加政府对饮用水开发计划的要求,对马达加斯加南部地区的水资源进行了概述。该地区属于热带半干旱气候,地理上从西到东分为马哈哈利高原、卡里姆波拉高原和安博沃贝盆地。该地区年平均降水量约为350 ~ 600 mm,向西减少。卡里姆波拉高原和安博沃贝盆地,其人口密度约为每平方公里15人,其下面是第三纪至第四纪的大陆沉积物。马哈哈利高原被第三纪石灰岩所占据,产生的地下水很少,因此高原不适合居住。欧洲共同体一直在援助修建一条从梅纳德拉河到卡里姆波拉高原的管道,以供应饮用水。另一方面,日本将支持开发安博洪贝盆地的水资源。大约有87000人生活在盆地海岸一侧的一座小山上,由于缺水而陷入困境。除了山,他们还设法获得了栖息的地下水和地表水。在山上取水非常困难,因为地下水位很深,离地面不到100米,而且夏季很容易干涸。建议加装井盖,调查深层地下水和悬空地下水,增加运水车,改善供水。日本地质调查局。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Water Resources of the Southern Semiarid Area of Madagascar
This paper outlines the water resources of the southern area of Madagascar, which is based on the field investigation and several reports concerning with the potable water development plan requested from the government of Madagascar.
The area, under the tropical semiarid climate, is classified geographically into the Mahahaly Plateau, the Karimbola Plateau and the Ambovombe Basin, from the west to the east. The average annual precipitation over the area is about 350∼600 mm and it decreases westward. The Karimbola Plateau and the Ambovombe Basin, where the population density is about 15 per one square kilometer, are underlain by continental sediments ranging in age from Tertiary to Quaternary. The Mahahaly Plateau is occupied by Tertiary limestone which yields little groundwater, so that the plateau is not inhabitable.
European Communities have been giving assistance to construction of a pipeline from the Menarndra River to the Karimbola Plateau for supplying potable water. On the other hand, Japan will support to develop water resources in the Ambovombe Basin. About 87, 000 people living in a hill, coastal side of the basin, are in great trouble from lack of water. Apart from the hill, they manage to gain perched groundwater as well as surface water. It is very difficult to get water in the hill because the groundwater level is deep, mo:e than 100 meters from the surface, and an inplubia easily dries up at summer season.
It is recommended to install more inplubia , to inquire deep groundwater as well as perched groundwater and to increase water wagons for the improvement of water supply. 地質調査所, Geological Survey of Japan.
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