Assessing Strategic Water Availability using remote sensing, GIS and a spatial water budget model : case from Upper Ing Basin, Thailand
Assessing Strategic Water Availability using remote sensing, GIS and a spatial water budget model : case from Upper Ing Basin, Thailand
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使用遥感、GIS 和空间水预算模型评估战略水资源可用性：泰国上游 Ing 盆地案例
DOI：
10.1080/02626667.2011.588604
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Krishna
中科院分区：
文献类型：
--
作者：
Bahadur KC;Krishna
本文利用遥感(RS)、地理信息系统(GIS)和空间水量平衡模型(SWBM)，在流域尺度上评价了不同发展路径下的战略水资源可获得性和利用。将SWBM应用于泰国北部的上宁盆地，以调查流域不同地区河流位置和产水量的时空变化。使用100米分辨率的数字高程模型和实际土地利用数据对1998-2007年进行了基本模拟。将模拟的河网与不同水流条件下的地形图进行了对比，成功地再现了模拟的河网。10年平均模拟河流量为1300 L/S，但在暴雨期间增加一倍以上，枯水期降至600 L/S以下。在旱季的典型一天，河流的总长度(基于25 L/S的流量门槛)相差大约一个系数。1.5.根据河流网络将流域划分为10个不同的区域，对农业用水需求和可能的开采进行了评估和提出。结果表明，在没有灌溉初始供水的情况下，有可能在不同的空间梯度上收集大量的水。计算了每个区域的月产水量；结果从整个流域每公顷产水量的不到50%到超过137%不等。这种差异是由于地形和土地覆盖的差异造成的。还研究了土地利用和气候变化对河水可利用性的影响。该盆地表现出截然不同的水文响应。与基础模拟相比，平均河流流量的变化分别为+27.6%， −32.1%，+94%和+52.9%，分别在砍伐森林，将土地利用从稻田改变为果园，裸地和降雨增加的情景下。SCI。J.56(6)，994-1014.
This paper assesses strategic water availability and use under different development pathways on a basin scale using remote sensing (RS), geographical information systems (GIS) and a spatial water budget model (SWBM). The SWBM was applied to the Upper Ing Basin in northern Thailand to investigate the spatial and temporal variations in the location of streams and water yields from different parts of the basin. The base simulation was carried out for the years 1998–2007 using a DEM and actual land-use data at 100-m resolution. The simulated stream network was compared with topographic maps under different flow conditions, which were successfully represented. The 10-year average simulated river flow rate was 1300 L/s, but it more than doubled during periods of heavy rainfall and decreased below 600 L/s in dry seasons. The total length of the streams (based on flow threshold of 25 L/s) on a typical day in the dry season differed by a factor of approx. 1.5. Agricultural water needs and possible extraction were assessed and presented by dividing the basin into 10 different zones based on the stream network. The results show that there is the potential for harvesting significant quantities of water at different spatial gradients with no initial water supply for irrigation. Monthly water yields for each zone were computed; the results varied from less than 50% to over 137% of the per hectare water yield for the entire basin. This variation was due to differences in topography and land cover. The impact of land use and climate change on streamwater availability was also studied. The basin shows very different hydrological responses. The changes in average river flow relative to the base simulation were +27.6%, −32.1%, +94% and +52.9% under deforestation, changing land use from paddy field to orchard, bare soil and increased rainfall scenarios, respectively.CitationBahadur KC, K. (2011) Assessing strategic water availability using remote sensing, GIS and a spatial water budget model: case study of the Upper Ing Basin, Thailand.Hydrol. Sci. J.56(6), 994–1014.