Study on the regional evapotranspiration over different surface conditions of the Longzici spring drainage
-
摘要: 龙子祠泉域是北方著名的岩溶大泉,目前泉流量衰减严重,评估泉域内涵养水源林工程对岩溶水增补效果成为一项重要研究课题。本文利用NOAA/AVHRR遥感数据,运用地表能量平衡系统(SEBS)模型并结合临汾气象站的实际观测数据(气温、气压、相对湿度和风速),反演了龙子祠泉域2014年4-10月的日均蒸散量和月均蒸散量,通过GIS的空间叠加对比分析了不同岩性和不同植被覆盖率条件下的陆面蒸散量特征。结果表明:碳酸盐岩地区陆面蒸散量与植被覆盖率之间呈正相关关系,而碎屑岩地区中等植被覆盖率的陆面蒸散量最低,在整体上碎屑岩地区的陆面蒸散量要高于碳酸盐岩地区。仅从陆面蒸散量的角度考虑,在碎屑岩地区保持中等的植被覆盖率将有利于增加岩溶水的入渗补给量,而在碳酸盐岩地区开展植树造林将提高陆面蒸散量,不利于降水入渗补给。Abstract: The Longzici spring system, one of the largest karst spring in North China, is located in the western margin of the Linfen basin, covering an area of 2,250 km2. The springs discharge at an annually average rate of 4.81 m3/s derived from the records from 1955 to 2013. The karst water has been an important source for local water supply. But now the spring flow dramatically degrades because of climate change and human activities. Precipitation is the main source of the spring water recharge. This recharge occurs in two ways, namely the infiltration of precipitation over the carbonate rock areas and linear leakage of stream and river water. So it is very important to evaluate the recharge of karst water through an afforestation project. Based on NOAA/AVHRR data, the daily and monthly evapotranspiration (ET) of the Longzici spring are estimated during the period of 2014.4-2014.10, using surface energy balance system (SEBS) and the data of meteorological stations in Linfen. The ET has a monthly average value of 99.21 mm, with the maximum monthly value of 197.26 mm in June and the minimum one of 40.49 mm in April. In addition, the regional ET over different lithology and vegetation coverage rates are analyzed through spatial overlay. The results indicate that the ET increases with the increasing vegetation coverage rates in the carbonate rock outcrop regions, while it is the lowest in the medium vegetation coverage rate of clastic rock regions. Overall, the ET in the clastic rock regions is higher than that in the carbonate rock outcrop regions. If only ET is taken into consideration, keeping the medium vegetation coverage rate in clastic rocks will be favorable to increasing of recharge of karst water and afforestation in carbonate rock areas will enhance ET but not favorable to recharge from rainfall infiltration.
-
[1] 梁永平,王维泰,赵春红,等.中国北方岩溶水变化特征及其环境问题[J].中国岩溶,2013,32(1):34-42. [2] 梁永平,韩行瑞.中国北方岩溶地下水环境问题与保护[M].北京:地质出版社,2013. [3] 高波.煤炭资源整合对临汾市城市水源地影响及保护对策[J].中国水利,2014(7):35-37. [4] 陈军锋,李秀彬.森林植被变化对流域水文影响的争论[J].自然资源学报,2001,16(5):475-478. [5] 周晓峰,赵惠勋,孙慧珍.正确评价森林水文效应[J].自然资源学报,2001,16(5):420-426. [6] 李慧赟,张永强,王本德.基于遥感叶面积指数的水文模型定量评价植被和气候变化对径流的影响[J].中国科学:技术科学,2012,42(8):963-971. [7] 李玉山.黄土高原森林植被对陆地水循环影响的研究[J].自然资源学报,2001,16(5):426-430. [8] 高洋洋,左其亭.植被覆盖变化对流域总蒸散发量的影响研究[J].水资源与水工程学报,2009,20(2):26-31. [9] 金晓媚,郭任宏,夏薇.基于MODIS数据的柴达木盆地区域蒸散量的变化特征[J].水文地质工程地质,2013,40(6):8-12. [10] 章程,袁道先.IGCP448岩溶生态系统全球对比研究进展[J].中国岩溶,2005,24(1):83-88. [11] 梁永平,潘军峰.山西省岩溶泉域水资源保护[M].北京:中国水利水电出版社,2008. [12] Su Z. Remote sensing of land use and vegetation for mesoscale hydrological studies [J].International Journal of Remote Sensing,2000,21(2):213-233. [13] Su Z. The Surface Energy Balance System(SEBS) for estimation of turbulent heat fluxes[J].Hydrology and Earth System Sciences,2002,6(1):85-89. [14] 郭晓寅,程国栋.遥感技术应用于地表面蒸散发的研究进展[J].地球科学进展,2004,19(1):107-114. [15] 卢娜,万力.基于RS的鄂尔多斯北部盆地地表蒸发量的计算[J].地质通报,2008,27(8):1165-1167. [16] 王黎明,周云轩,王钦军.吉林省西部地表蒸散与土地利用/覆盖变化关系[J].吉林大学学报:地球科学版,2009,39(5):907-911. [17] 崔亚莉,徐映雪,邵景力,等.应用遥感方法研究黄河三角洲地表蒸发及其与下垫面关系[J].地学前缘,2005,12(S1):159-165. [18] 陈云浩,李晓兵,史培军.中国西北地区蒸发散量计算的遥感研究[J].地理学报,2001,56(3):261-268. [19] 吴炳方,邵建华.遥感估算蒸腾蒸发量的时空尺度推演方法及应用[J].水利学报,2006,37(3):286-292. [20] 金晓媚,万力,梁继运.水均衡法验证蒸散量计算的可靠性:以张掖盆地为例[J].现代地质,2008,22(2):299-303. [21] 庞冬辉,沈丽娜,蒋忠诚,等.广西弄拉峰丛洼地灌丛岩生优势种光合生理生态特征日变化研究[J].中国岩溶,2010,29(3):293-300. [22] 杨劼,高清竹,乌力吉,等.库布齐沙地油蒿蒸腾作用特征及其与环境因子的关系[J].内蒙古大学学报(自然科学版),1999,30(3):372-376. [23] 梁钊雄,王兮之,魏兴琥,等.基于TM影像的广西河池市岩溶地区植被覆盖度的动态变化研究[J].中国岩溶,2014,33(2):208-215.
点击查看大图
计量
- 文章访问数: 1441
- HTML浏览量: 253
- PDF下载量: 1264
- 被引次数: 0