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Northwest A&F University (2021)

Temporal and Spatial Distribution of Crop Evapotranspiration in Shiyang River Basin

佟玲

Titre : Temporal and Spatial Distribution of Crop Evapotranspiration in Shiyang River Basin

Auteur : 佟玲

Grade : Master 2021

Université : Northwest A&F University

Résumé partiel
Shiyang River Basin is one of the three largest interior river basins in the HexiCorridor of Northwest China, with the development of industry and agriculture, waterdemand increased dramatically, and contradiction of water supply and demand becamemore and more severe. “No irrigation, no agriculture”is a typical trait for Shiyang RiverBasin and agriculture is a leading water consumer. In 2000, the total consumption of allsocial and economic departments was 2.854 billion m3, among it, 2.455 billion m3 wasconsumed on irrigation, which amounted to 86.02% of the total water volume. Study ontemporal and spatial distribution of regional crop evapotranspiration is of great scientificsignificance on improving benign cycle of compound system of waterresources-ecology-economy-society, realizing sustainable development of agriculture inthe basin, and sustainable utilization of water resources in arid areas. The followingcontents were studied in the thesis : ①The meteorological factors’ variation trend of Shiyang River Basin in the recent 50years was analyzed. Except the precipitation of Tianzhu station basically had no variation,mean temperature, mean maximum temperature and precipitation of other stations allshowed a trend of increase. Sunshine hours of Gulang had unobvious increase, and those ofLiangzhou had unobvious decrease, while those of other stations all had obvious increase.Annual evaporation of Gulang had a trend of increase, which was contrary to that of otherstations. Variation of average relative humidity of every station was not obvious, averagewind speed of Gulang was relatively stable, that of Tianzhu increased obviously, and thatof other stations declined very obviously. ②Penman-Monteith method which recommended in FAO-56 was adopted tocalculate monthly ET0 of Shiyang River Basin and its nearby stations over years

Mots clés : Shiyang River Basin ;Penman-Monteith method ;evapotranspiration;distributed model ;

Présentation (CNKI)

Page publiée le 28 février 2022