DAFNE Basemap for the Zambezi River Basin case study

Spatial dataset derived from many different open data repositories and cropped on the Zambezi River Basin boundary, used to create a base-map describing the components of Water-Energy-Food nexus in the case study.

zambezi.gpkg: vector dataset including the following layers, together with the related map style for QGIS Desktop used in the DAFNE Geoportal basemap:

basin: Hydrological basin of the Zambezi river (case study boundary)

subbasin: Basins of the main tributaries of the Zambezi River

waterbodies: Natural lakes and reservoirs boundaries

rivers: River network

stations: Streamflow, Water level and Rainfall Gauging stations

dams: Existing dams

wetlands: Wetlands

protected_areas: Protected areas

aei_pct_cells: Area equipped for irrigation, expressed as percentage of total area.

roads: Main roads network

cities: Main cities in the riparian countries

countries: Administrative borders of riparian countries

markers: DAFNE model components location, with existing and planned dams and power plants, irrigation schemes, environmental target areas.

zambezi_raster.zip: raster dataset including the following layers:

DEM_1km: Digital Elevation Model

Global Surface Water:

change: Occurrence Change Intensity map provides information on where surface water occurrence increased, decreased or remained the same between 1984-1999 and 2000-2015

extent: Maximum Water Extent shows all the locations ever detected as water over period 1984-2015

occurence: Occurrence shows where surface water occurred between 1984 and 2015 and provides information concerning overall water dynamics.

recurrence: Recurrence provides information concerning the inter-annual behaviour of water surfaces and captures the frequency with which water returns from year to year.

seasonality: Seasonality map provides information concerning the intra-annual behaviour of water surfaces for a single year (2015) and shows permanent and seasonal water and the number of months water was present.

transitions: Transitions map provides information on the change in surface water seasonality between the first and last years (between 1984 and 2015) and captures changes between the three classes of not water, seasonal water and permanent water.

Original data sources includes:

AQUASTAT, the FAO global information system on water resources and agricultural water management;

Natural Earth,  a public domain map dataset available at different scales;

Protected Planet,  the most up to date and complete source of data on protected areas and other effective area-based conservation measures, maintained by UNEP-WCMC and IUCN;

OpenStreetMap, a collaborative project to create a free editable map of the world;

ZAMWIS, a management information system for the Zambezi River Basin;

NASA's Shuttle Radar Topography Mission (SRTM) Digital Elevation Database;

Global Water Surface, a virtual time machine that maps the location and temporal distribution of water surfaces at the global scale.

本空间数据集源自多个不同的开放数据仓库，并基于赞比西河流域边界进行裁切，用于构建本案例研究中描述水-能源-粮食纽带关系（Water-Energy-Food nexus）的底图。

zambezi.gpkg：矢量数据集，包含以下图层，以及DAFNE地理门户底图中使用的QGIS Desktop（QGIS桌面端）配套地图样式：

- basin：赞比西河水文流域（本案例研究边界）
- subbasin：赞比西河主要支流流域
- waterbodies：天然湖泊与水库边界
- rivers：河网
- stations：流量、水位与雨量监测站
- dams：已建成水坝
- wetlands：湿地
- protected_areas：保护区
- aei_pct_cells：灌溉装备面积占总区域的百分比
- roads：主干道网
- cities：沿岸国家主要城市
- countries：沿岸国家行政边界
- markers：DAFNE模型组件点位，涵盖已建及规划中的水坝、电站、灌溉方案与环境目标区域

zambezi_raster.zip：栅格数据集，包含以下图层：

- DEM_1km：数字高程模型（Digital Elevation Model）
- Global Surface Water（全球地表水数据）：
- change：变化强度图，提供1984-1999年与2000-2015年期间地表水出现范围增加、减少或保持不变的区域信息
- extent：最大水体范围，展示1984-2015年期间所有曾被检测为水体的位置
- occurence：出现频次图，展示1984-2015年地表水出现的区域，并提供整体水动力动态相关信息
- recurrence：重现性图，提供地表水的年际变化特征信息，可反映水体逐年回归的频率
- seasonality：季节性图，提供2015年单一年份内地表水的年内变化特征，展示永久性水体、季节性水体以及水体存在的月份数
- transitions：转换类型图，展示首末年份（1984年至2015年）间地表水季节性变化信息，可捕捉非水体、季节性水体与永久性水体三类之间的转换情况

原始数据来源包括：

- AQUASTAT：联合国粮食及农业组织（FAO）水资源与农业水管理全球信息系统
- Natural Earth：多比例尺开放领域地图数据集
- Protected Planet：由联合国环境规划署世界保护监测中心（UNEP-WCMC）与国际自然保护联盟（IUCN）维护的最新且最完整的保护区及其他有效基于区域的保护措施数据来源
- OpenStreetMap：协作创建全球免费可编辑地图的开放项目
- ZAMWIS：赞比西河流域管理信息系统
- 美国国家航空航天局（NASA）的航天飞机雷达地形测绘任务（SRTM）数字高程数据库
- Global Water Surface：全球尺度地表水位置与时间分布的虚拟时空映射工具