干旱区生态环境知识资源中心(Arid): Accounting for Seasonal Land Use Dynamics to Improve Estimation of Agricultural Irrigation Water Withdrawals

Arid

DOI	10.3390/w11122471
	Accounting for Seasonal Land Use Dynamics to Improve Estimation of Agricultural Irrigation Water Withdrawals
	Msigwa, Anna 1,2; Komakech, Hans C.1; Verbeiren, Boud 2; Salvadore, Elga 2,3; Hessels, Tim 4; Weerasinghe, Imeshi 2; van Griensven, Ann 2,3
通讯作者	Msigwa, Anna
来源期刊	WATER
EISSN	2073-4441
出版年	2019
卷号	11 期号:12
英文摘要	The assessment of water withdrawals for irrigation is essential for managing water resources in cultivated tropical catchments. These water withdrawals vary seasonally, driven by wet and dry seasons. A land use map is one of the required inputs of hydrological models used to estimate water withdrawals in a catchment. However, land use maps provide typically static information and do not represent the hydrological seasons and related cropping seasons and practices throughout the year. Therefore, this study assesses the value of seasonal land use maps in the quantification of water withdrawals for a tropical cultivated catchment. We developed land use maps for the main seasons (long rains, dry, and short rains) for the semi-arid Kikuletwa catchment, Tanzania. Three Landsat 8 images from 2016 were used to develop seasonal land use land cover (LULC) maps: March (long rains), August (dry season), and October (short rains). Quantitative and qualitative observation data on cropping systems (reference points and questionnaires/surveys) were collected and used for the supervised classification algorithm. Land use classifications were done using 20 land use and land cover classes for the wet season image and 19 classes for the dry and short rain season images. Water withdrawals for irrigated agriculture were calculated using (1) the static land use map or (2) the three seasonal land use maps. Clear differences in land use can be seen between the dry and the other seasons and between rain-fed and irrigated areas. A difference in water withdrawals was observed when seasonal and static land use maps were used. The highest differences were obtained for irrigated mixed crops, with an estimation of 572 million m(3)/year when seasonal dynamic maps were used and only 90 million m(3)/year when a static map was used. This study concludes that detailed seasonal land use maps are essential for quantifying annual irrigation water use of catchment areas with distinct dry and wet seasonal dynamics.
英文关键词	seasonal land use tropical catchments crop calendar irrigation
类型	Article
语种	英语
国家	Tanzania ; Belgium ; Netherlands
开放获取类型	gold, Green Published
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000507378600044
WOS关键词	COVER ; EVAPOTRANSPIRATION ; ACCURACY ; IMPACT ; MODEL ; RIVER ; PART ; REGION ; GIS
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
EI主题词	2019-12-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311201
作者单位	1.Nelson Mandela African Inst Sci & Technol, Arusha 447, Tanzania; 2.Vrije Univ, Dept Hydrol & Hydraul Engn, Pl Laan 2-1050, B-1050 Brussels, Belgium; 3.IHE Delft Inst Water Educ, Westvest 7, NL-2611 AX Delft, Netherlands; 4.Delft Univ Technol, Fac Civil Engn & Geosci, Dept Water Management, NL-2628 CN Delft 1, Netherlands
推荐引用方式 GB/T 7714	Msigwa, Anna,Komakech, Hans C.,Verbeiren, Boud,et al. Accounting for Seasonal Land Use Dynamics to Improve Estimation of Agricultural Irrigation Water Withdrawals[J],2019,11(12).
APA	Msigwa, Anna.,Komakech, Hans C..,Verbeiren, Boud.,Salvadore, Elga.,Hessels, Tim.,...&van Griensven, Ann.(2019).Accounting for Seasonal Land Use Dynamics to Improve Estimation of Agricultural Irrigation Water Withdrawals.WATER,11(12).
MLA	Msigwa, Anna,et al."Accounting for Seasonal Land Use Dynamics to Improve Estimation of Agricultural Irrigation Water Withdrawals".WATER 11.12(2019).