生长季流动沙地水量平衡研究

摘要/Abstract

摘要： 利用水分分配箱对流动沙地土面蒸发量和入渗补给量的月动态特征及其水量平衡作了定量研究。结果表明:①生长季流动沙地土面蒸发量从４月开始逐渐增大,至８月达到蒸发的最高点,９月蒸发量开始回落;5月、6月受气温的影响蒸发量相对较小,只占到同期降水量的30%~40％,有利于土壤储存更多的水分;生长季总蒸发量为167.42 mm,占同期降水量的76.07％,远小于固定沙地小叶锦鸡儿灌丛蒸散量占同期降水量的135.83％的比值。②补给量从4月开始逐渐增大,8月达到最大值16.79 mm,进入9月,随着降水量的减少以及8月较大的蒸发消耗,补给量迅速减少。补给系数从5月至8月逐渐增大,最大值可达到26.73％,平均值为15.09％。

关键词: 生长季, 流动沙地, 蒸发量, 补给量, 水量平衡

Abstract: Based on application of the theory of water balance, quantitative research on the water balance and the dynamical characteristics of monthly evaporation and replenishment of mobile sandy land in the growing season is conducted. The results show that evaporation quantity in mobile sandy land increases gradually from April to August, and the evaporation reaches the largest in August and then tends to decrease in September; evaporation quantity in May and June is less than that in the other months, and it is only 30% to 40% of the corresponding period precipitation. This evaporation pattern is useful for accumulating more water in soil. Total evaporation in the growing season is 167.42 mm, which is less than evapotranspiration of Caragana microphylla shrubs, and the former only reaches 76.07% of the corresponding period precipitation, but the latter reaches 135.83% of the corresponding period precipitation. The quantity of replenishment increases gradually from April to August, and reaches the largest (16.79 mm) in August, then deceases rapidly in September due to the higher evaporation in August and less precipitation in September. The coefficient of replenishment increases gradually from May to August, the maximum reaches 26.73%, and the average value is 15.09%.

Key words: growing season, mobile sandy land, evaporation, replenishment, water balance

中图分类号:

S152.7

刘新平;赵哈林;何玉惠;张铜会;赵学勇;李玉霖. 生长季流动沙地水量平衡研究[J]. 中国沙漠, 2009, 29(4): 663-667.

LIU Xin-ping;ZHAO Ha-lin;HE Yu-hui;ZHANG Tong-hui;ZHAO Xue-yong;LI Yu-lin. Water Balance of Mobile Sandy Land during the Growing Season[J]. JOURNAL OF DESERT RESEARCH, 2009, 29(4): 663-667.

参考文献

[1]赵文智,程国栋.干旱区生态水文过程研究若干问题评述[J].科学通报,2001,46(22):1851-1857.
[2]刘昌明,孙睿.水循环的生态学方面:土壤-植被-大气系统水分能量平衡研究进展[J].水科学进展,1999,10(3):251-259.
[3]肖洪浪,段争虎,宋耀选,等.黄土高原西部兰州市郊植被的水环境响应[J].中国沙漠,2006,26(4):517-521.
[4]张志山,樊恒文,赵金龙,等.沙漠人工植物群落的根系分布及动态[J].中国沙漠,2006,26(4):637-643.
[5]王涛,吴薇,薛娴,等.近50年来中国北方沙漠化土地的时空变化[J].地理学报,2004,59(2):203-212.
[6]朱震达,陈广庭.中国土地沙质荒漠化[M].北京:科学出版社,1994:46-59.
[7]Wang Q X,Takahash H.A land surface water deficit model for an arid and semiarid region:Impact of desertification on the water deficit status in the Loess Plateau,China [J].Journal of Climate,1999,12(1):244-257.
[8]赵哈林,周瑞莲,赵学勇,等.科尔沁沙地沙漠化正、逆过程的地面判别方法[J].中国沙漠,2008,28(1):8-15.
[9]王新平,李新荣,康尔泗,等.腾格里沙漠东南缘人工植被区降水入渗与再分配规律研究[J].生态学报,2003,23(6):1234-1241.
[10]Huang Yilong, Chen Liding, FU Bojie.Evapotranspiration and soil moisture balance for vegetative restoration in a Gully Catchment on the Loess Plateau, China[J].Pedosphere,2005,15(4):509-517.
[11]Wang Xinping, Ronny Berndtsson,Li Xinrong. Water balance change for a re-vegetated xerophyte shrub area[J].Hydrological Sciences-Journal-des Sciences Hydrologiques,2004,49(2):283-295.
[12]雷志栋,胡和平,杨诗秀.土壤水研究进展与评述[J].水科学进展,1999,10(3):311-318.
[13]冯起,程国栋.我国沙地水分分布状况及其意义[J].土壤学报,1999,36(2):225-236.
[14]赵哈林,苏永中,张华,等.灌丛对流动沙地土壤特性和草本植物的影响[J].中国沙漠,2007,27(3):385-390.
[15]李玉强,赵哈林,赵学勇,等.科尔沁沙地夏秋(6—9月)季不同类型沙丘土壤呼吸对气温变化的响应[J].中国沙漠,2008, 28(2):249-254.
[16]刘新平,张铜会,赵哈林,等.流动沙丘降水入渗和再分配过程[J].水利学报,2006,37(2):166-171.
[17]刘新平,张铜会,赵哈林,等.流动沙丘干沙层厚度对土壤水分蒸发的影响[J].干旱区地理,2006,29(4):523-526.
[18]赵兴梁.沙坡头地区植物固沙问题的探讨[M]//中国科学院兰州沙漠研究所沙坡头沙漠科学研究站.腾格里沙漠沙坡头地区流沙治理研究(二).银川:宁夏人民出版社,1988:27-57.