干旱区生态环境知识资源中心(Arid): Measuring soil evaporation from a cropped land in the semi-arid Makanya catchment, Northern Tanzania: Methods and challenges

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DOI	10.1016/j.pce.2020.102884
	Measuring soil evaporation from a cropped land in the semi-arid Makanya catchment, Northern Tanzania: Methods and challenges
	Nyabwisho, Kobusinge Aloys; Diels, Jan; Kahimba, Fredrick Casian; Van Griensven, Ann
通讯作者	Nyabwisho, KA
来源期刊	PHYSICS AND CHEMISTRY OF THE EARTH
ISSN	1474-7065
EISSN	1873-5193
出版年	2020
卷号	118
英文摘要	Estimating soil water loss from cropped land is vital for sustainable management of water resources in semi-arid and hot regions. Soil evaporation (E-s) is an important process in these regions but hard to quantify. The study aimed at quantifying E-s in maize field under three treatments using micro-lysimeters (MLs). It also aims to identify sources of challenges in the method. The treatments were; flat cultivation with mulching (FCM), without mulches (FC) and double digging (DD, manual tillage practice), were replicated trice. In each plot, two micro-lysimeters were installed, one containing soil samples to measure soil evaporation and an empty one to measure throughfall (Tr) under the maize canopy. The 24-hr soil samples weight change and throughfall records were used to estimate soil evaporation for each plot. The estimated mean daily soil evaporation was 3.4 mm/day in FC, 2.1 mm/day in FCM and 3.0 mm/day for DD. There was a challenge in the method during the rainfall period which lead to both negative and high E-s values during rainfall period. Less thmughfall from empty MLs than in soil containing MLs caused the negative E-s and the opposite was true for higher E-s during rainy period. We urge the method to be improved by measuring throughfall simultaneously with soil weight changes immediately after rainfall events and minimize random errors by using many MLs. To have more results on reducing water losses while increasing available water for crop growth in this water scarce environment, we suggest FCM to be combined with DD treatment.
英文关键词	Double-digging Maize Mulching Micro-lysimeter Soil evaporation Semi-arid
类型	Article
语种	英语
开放获取类型	Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000575782800006
WOS关键词	BARE-SOIL ; WATER PRODUCTIVITY ; ROW CROP ; EVAPOTRANSPIRATION ; TILLAGE ; MODEL ; SYSTEM ; LYSIMETERS ; EFFICIENCY ; CANOPY
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326654
作者单位	[Nyabwisho, Kobusinge Aloys] Water Inst WI, Dept Water Resources & Irrigat, Dar Es Salaam, Tanzania; [Nyabwisho, Kobusinge Aloys; Diels, Jan] Katholieke Univ Leuven, Soil & Water Div, Dept Earth & Environm Sci, Leuven, Belgium; [Kahimba, Fredrick Casian] Sokoine Univ Agr SUA, Dept Engn Sci & Technol, Morogoro, Tanzania; [Van Griensven, Ann] Vrije Univ Brussel, Dept Hydrol & Hydraul Engn, Brussels, Belgium
推荐引用方式 GB/T 7714	Nyabwisho, Kobusinge Aloys,Diels, Jan,Kahimba, Fredrick Casian,et al. Measuring soil evaporation from a cropped land in the semi-arid Makanya catchment, Northern Tanzania: Methods and challenges[J],2020,118.
APA	Nyabwisho, Kobusinge Aloys,Diels, Jan,Kahimba, Fredrick Casian,&Van Griensven, Ann.(2020).Measuring soil evaporation from a cropped land in the semi-arid Makanya catchment, Northern Tanzania: Methods and challenges.PHYSICS AND CHEMISTRY OF THE EARTH,118.
MLA	Nyabwisho, Kobusinge Aloys,et al."Measuring soil evaporation from a cropped land in the semi-arid Makanya catchment, Northern Tanzania: Methods and challenges".PHYSICS AND CHEMISTRY OF THE EARTH 118(2020).