Hydrological Impact of a High-Density Reservoir Network in Semiarid Northeastern Brazil
Hydrological Impact of a High-Density Reservoir Network in Semiarid Northeastern Brazil
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DOI：
10.1061/(asce)he.1943-5584.0000404
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发表时间：
2012-01-01
影响因子：
2.4
通讯作者：
Guentner, Andreas
中科院分区：
文献类型：
--
作者：
Costa Malveira, Vanda Tereza;de Araujo, Jose Carlos;Guentner, Andreas
在世界各地，尤其是在缺水的环境中，如巴西东北部地区，可以越来越多地发现密集的水库网络，以及数千座小型水坝。虽然单个小型水坝的影响可能微不足道，但它们的联合影响已证明对水和沉积物的连通性具有相关性。然而，文献是稀缺的影响，这种网络对水的可用性和/或可持续性的中型或大型流域。这项研究旨在评估半干旱的上Jaguaribe盆地（UJB; 24，200 km（2），在巴西）45年（1961-2005）的密集水库网络的影响，并调查最大限度地提高其水文可持续性的网络安排。对1970年和2002年的图像进行了分析，以评估网络的时间演变。半干旱环境中的水供应（WASA）模式，这证明是有效的上Jaguaribe盆地，被用来评估其可持续性的近100个不同的安排。优化过程使用Simplex-MSX算法进行。结果表明，在整个分析期间，流域的水文可持续性增加。然而，自1990年代后期以来，该系统显示出明显的饱和迹象。优化过程确定了最佳网络布置应具有约3年的停留时间，体积密度为0.2 hm（3）.km（-2），以及水库规模连续性对获得有效水文性能的重要性。DOI：10.1061/（ASCE）HE.1943-5584.0000404。(C)2012年美国土木工程师学会。
Dense reservoir networks, with thousand of small dams, can be increasingly found throughout the world, especially in water-scarce environments, such as the Brazilian northeastern region. Although the effect of individual small dams might be negligible, their joint effect has proved to be relevant on water and sediment connectivity. Literature, however, is scarce concerning the effect of such networks on water availability and/or sustainability of mesoscale or large-scale basins. This research intended both to assess the effect of the dense reservoir network of the semiarid Upper Jaguaribe Basin (UJB; 24,200 km(2), in Brazil) for a 45-year period (1961-2005) and to investigate a network arrangement that maximized its hydrologic sustainability. Imagery of the years 1970 and 2002 was analyzed to assess temporal evolution of the network. The Water Availability in Semiarid Environments (WASA) model, which proved valid for the Upper Jaguaribe Basin, was used to assess its sustainability for almost 100 different arrangements. The optimization process was performed using the Simplex-MSX algorithm. Results showed that the hydrologic sustainability of the basin increased throughout the analysis period. Nonetheless, since the late 1990s, the system showed clear signs of saturation. The optimization process identified that the best network arrangement should have residence time of approximately 3 years, with volumetric density of 0.2 hm(3).km(-2), and the importance of the reservoir size continuity to obtain effective hydrologic performance. DOI: 10.1061/(ASCE)HE.1943-5584.0000404. (C) 2012 American Society of Civil Engineers.