基于MOD16产品的怒江流域中上游蒸散发分布特征研究
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摘要
[目的]研究怒江流域中上游蒸散发的空间分布特征,为流域水资源合理开发及生态保护提供支撑。[方法]利用气象站点实测降水资料,验证TRMM(tropical rainfall measuring mission)3B43产品在怒江流域中上游的精度,进而对MODIS(moderate-resolution imagine spectroradiometer)全球陆地蒸散发产品(MOD16)在该流域的适用性进行检验。在此基础上,探讨该流域蒸散发及产水量的空间分布特征。[结果]①TRMM3B43数据与站点实测月降水量相关系数R为0.86,在怒江流域中上游使用具有较好精度,MOD16蒸散发量相对偏大,但仍具有一定的适用性;②研究区多年平均蒸散发量为489.4 mm,蒸散发主要集中在300～800 mm;③降水量与蒸散发量的差值(P-E)与降水量(P)的空间分布格局相似,(P-E)/P在无植被地区较大(为0.33),在植被覆盖区相对较小。[结论]研究区多年平均蒸散发量空间分布差异较大,沿河流呈现出低—高—低—高的变化规律;MOD16产品具有覆盖范围广,时空上连续等特点,能够为缺资料地区蒸散发的相关研究提供相对可靠的数据支撑。
[Objective] The spatial distribution characteristics were studied in order for rational utilization of water resources utilization and ecological protection in the middle and upper Nujiang River Basin. [Methods] Making use of observations from meteorological stations, the performance of TRMM(tropical rainfall measuring mission) 3 B43 product in the middle and upper Nujiang River Basin was verified, and then the applicability of MOD16(moderate-resolution imagine spectroradiometer) products were further examined. The spatial distribution characteristics of evapotranspiration and water yield were analyzed.[Results] ① At monthly scale, the correlation coefficient between TRMM 3 B43 estimates and rain gauge observations was 0.86, indicating TRMM 3 B43 data had good accuracy in the middle and upper Nujiang River Basin. The evapotranspiration obtained from MOD16 data was higher, but still had applicability. ② The mean annual evapotranspiration in the study area mainly ranged from 300 to 800 mm, and the regional mean value was 489.4 mm. ③ The spatial distribution of(P-E) was similar to that of P, while(P-E)/P(0.33) in barren areas and smaller in vegetation-covered areas. [Conclusion] The spatial distribution of evapotranspiration was heterogeneous, showing a low-high-low-high variation along the river. With widespread coverage and continuous observation, MOD16 products could provide reliable support for evapotranspiration research in lack-data watershed.
[Objective] The spatial distribution characteristics were studied in order for rational utilization of water resources utilization and ecological protection in the middle and upper Nujiang River Basin. [Methods] Making use of observations from meteorological stations, the performance of TRMM(tropical rainfall measuring mission) 3 B43 product in the middle and upper Nujiang River Basin was verified, and then the applicability of MOD16(moderate-resolution imagine spectroradiometer) products were further examined. The spatial distribution characteristics of evapotranspiration and water yield were analyzed.[Results] ① At monthly scale, the correlation coefficient between TRMM 3 B43 estimates and rain gauge observations was 0.86, indicating TRMM 3 B43 data had good accuracy in the middle and upper Nujiang River Basin. The evapotranspiration obtained from MOD16 data was higher, but still had applicability. ② The mean annual evapotranspiration in the study area mainly ranged from 300 to 800 mm, and the regional mean value was 489.4 mm. ③ The spatial distribution of(P-E) was similar to that of P, while(P-E)/P(0.33) in barren areas and smaller in vegetation-covered areas. [Conclusion] The spatial distribution of evapotranspiration was heterogeneous, showing a low-high-low-high variation along the river. With widespread coverage and continuous observation, MOD16 products could provide reliable support for evapotranspiration research in lack-data watershed.
引文
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[22] 赫晓慧,梁冰洁,郭恒亮,等.基于MOD16的北洛河流域蒸散发空间格局演变研究[J].水土保持通报,2017,37(1):177-182.
[23] 宋璐璐.青藏高原蒸散发时空变化特征研究[D].北京:中国科学院地理科学与资源研究所,2013.
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[25] 刘国纬.西藏高原的水文特征[J].水利学报,1992(5):1-8.
[26] 杜军,房世波,唐小萍,等.1981—2010年西藏怒江流域潜在蒸发量的时空变化[J].气候变化研究进展,2012,8(1):35-42.
[2] Allen R G,Pereira L S,Howell T A,et al.Evapotranspiration information reporting(I):Factors governing measurement accuracy[J].Agricultural Water Management,2011,98(6):899-920.
[3] Li Zhaoliang,Tang Ronglin,Wan Zhengming,et al.A review of current methodologies for regional evapotranspiration estimation from remotely sensed data[J].Sensors,2009,9(5):3801-3853.
[4] Chen Yang,Xia Jiangzhou,Liang Shunlin,et al.Comparison of satellite-based evapotranspiration models over terrestrial ecosystems in China[J].Remote Sensing of Environment,2014,140(140):279-293.
[5] 冯松,汤懋苍,王冬梅.青藏高原是我国气候变化启动区的新证据[J].科学通报,1998,43(6):633-636.
[6] 梁小文,杨梅学,万国宁,等.青藏高原气温序列的均一性研究[J].冰川冻土,2015,37(2):275-285.
[7] 郑然,李栋梁,蒋元春.全球变暖背景下青藏高原气温变化的新特征[J].高原气象,2015,34(6):1531-1539.
[8] Liu Xiaomang,Zheng Hongxing,Zhang Minghua,et al.Identification of dominant climate factor for pan evaporation trend in the Tibetan Plateau[J].Journal of geographical sciences,2011,21(4):594-608.
[9] 中国科学院青藏高原综合科学考察队.西藏河流与湖泊[M].北京:科学出版社,1984.
[10] 罗贤,何大明,季漩,等.近50年怒江流域中上游枯季径流变化及其对气候变化的响应[J].地理科学,2016,36(1):107-113.
[11] 杜军,翁海卿,袁雷,等.近40年西藏怒江河谷盆地的气候特征及变化趋势[J].地理学报,2009,64(5):581-591.
[12] 周刊社,杜军,袁雷,等.西藏怒江流域高寒草甸气候生产潜力对气候变化的响应[J].草业学报,2010,64(5):17-24.
[13] 刘冬英,沈燕舟,王政祥.怒江流域水资源特性分析[J].人民长江,2008,39(17):64-66.
[14] Huffman G J,Adler R F,Bolvin D T,et al.The TRMM multisatellite precipitation analysis(TMPA):Quasi-global,multiyear,combined-sensor precipitation estimates at fine scales[J].Journal of Hydrometeorology,2007,8(1):38-55.
[15] 谢红霞,刘旭星,隋兵,等.TRMM降雨数据在湖南省长株潭地区的适用性[J].水土保持通报.2017,37(3):295-301.
[16] 齐文文,张百平,庞宇,等.基于TRMM数据的青藏高原降水的空间和季节分布特征[J].地理科学,2013,33(8):999-1005.
[17] 程珂,朱祯,李铭,等.TRMM3B43降水产品在西藏地区的精度检验和应用[J].水利水电技术,2014,45(1):44-46.
[18] Mu Qiaozhen,Heinsch F A,Zhao Maosheng,et al.Development of a global evapotranspiration algorithm based on MODIS and global meteorology data[J].Remote sensing of Environment,2007,111(4):519-536.
[19] Mu Qiaozhen,Zhao Maosheng,Running S W.Improvements to a MODIS global terrestrial evapotranspiration algorithm[J].Remote Sensing of Environment,2011,115(8):1781-1800.
[20] 吴桂平,刘元波,赵晓松,等.基于MOD16产品的鄱阳湖流域地表蒸散量时空分布特征[J].地理研究,2013,32(4):617-627.
[21] 贺添,邵全琴.基于MOD16产品的我国2001—2010年蒸散发时空格局变化分析[J].地球信息科学学报,2014,16(6):979-988.
[22] 赫晓慧,梁冰洁,郭恒亮,等.基于MOD16的北洛河流域蒸散发空间格局演变研究[J].水土保持通报,2017,37(1):177-182.
[23] 宋璐璐.青藏高原蒸散发时空变化特征研究[D].北京:中国科学院地理科学与资源研究所,2013.
[24] 杨大文,杨汉波,雷慧闽.流域水文学[M].北京:清华大学出版社,2014.
[25] 刘国纬.西藏高原的水文特征[J].水利学报,1992(5):1-8.
[26] 杜军,房世波,唐小萍,等.1981—2010年西藏怒江流域潜在蒸发量的时空变化[J].气候变化研究进展,2012,8(1):35-42.
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