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  The WEAP Approach Computer modeling in the field of water resources has a long history. Many sophisticated models have faltered by being mathematically obscure and overly ambitious in attempting to "optimize" solutions to real-life problems. Experience shows that the best approach is to build a straightforward and flexible tool to assist, but not substitute for, the user of the model. WEAP represents a new generation of water planning software that utilizes the powerful capability of today's personal computers to give water professionals everywhere access to appropriate tools. The design of WEAP is guided by a number of methodological considerations: an integrated and comprehensive planning framework; use of scenario analyses in understanding the effects of different development choices; Demand-management capability; Environmental assessment capability; and Ease-of-use. These are discussed in turn below. Integrated And Comprehensive Planning Framework WEAP places the ev...

  Demand Sites A demand site is best defined as a set of water users that share a physical distribution system, that are all within a defined region, or that share an important withdrawal supply point. You also must decide whether to lump demands together into aggregate demand sites (e.g., counties) or to separate key water uses into individual demand sites. The level of aggregation generally is determined by the level of detail of water use data available. Demand data may not be available for individual sites, but may only be available for a larger unit such as a city or county. In addition to data, your definition of demand sites may also depend on the level of detail desired for your analysis. When defining demand sites, it is useful to inventory the actual physical infrastructure, such as pumping stations, withdrawal facilities, wastewater treatment plants and well fields. You should think carefully about the configuration of the entire demand and supply system, including the l...

  Rivers, Diversions And River Nodes Both rivers and diversions in WEAP are made up of river nodes connected by river reaches. Other rivers may flow in (tributaries) or out (diversions) of a river. There are seven types of river nodes: R eservoir  nodes, which represent reservoir sites on a river. A river reservoir node can release water directly to demand sites or for use downstream, and can be used to simulate hydropower generation. R un-of-river hydropower  nodes, which define points on which run-of-river hydropower stations are located. Run-of-river stations generate hydropower based on varying streamflows but a fixed water head in the river. F low requirement  nodes, which defines the minimum instream flow required at a point on a river or diversion to meet water quality, fish & wildlife, navigation, recreation, downstream or other requirements. W ithdrawal  nodes, which represent points where any number of demand sites receive water directly from a riv...

  Supply And Resources Results Inflows To Area Water entering the system (river headflows, surface water inflows to reaches, groundwater recharge, local reservoir inflows, other local supply inflows, catchment precipitation). Outflows From Area Water leaving the system (consumption at demand sites, catchment evapotranspiration (ET Actual), evaporation on river reaches and reservoirs, losses in transmission and return flow links, groundwater and local reservoir overflow, losses in wastewater treatment, and outflows from the end of rivers and diversions that do not flow into other rivers or groundwater nodes). Note: Inflows to area may not equal total outflows from area due to changes in storage in reservoirs and groundwater . River Streamflow : The streamflow at selected nodes and reaches along a river. You can plot a line for each point on the river over time (choose Year for the X Axis, or a line for each month plotted along the river (choose River Nodes and Reaches for the X Axis...

DỰ BÁO THỜI TIẾT - NGÀY VÀ ĐÊM 29/01/2021 HÀ NỘI Nhiều mây, có mưa nhỏ vài nơi. Gió đông bắc cấp 2, cấp 3. Trời rét. Nhiệt độ thấp nhất từ : 12 đến 14 độ Nhiệt độ cao nhất từ : 18 đến 21 độ PHÍA TÂY BẮC BỘ Nhiều mây, có mưa nhỏ vài nơi. Gió nhẹ, Trời rét, có nơi rét đậm. Nhiệt độ thấp nhất từ : 12 đến 15 độ, có nơi dưới 12 độ Nhiệt độ cao nhất từ : 17 đến 20 độ; riêng Lai Châu-Điện Biên 21 đến 24 độ PHÍA ĐÔNG BẮC BỘ Nhiều mây, có mưa nhỏ vài nơi, Gió đông bắc cấp 2 đến 3, Trời rét, vùng núi có nơi rét đậm. Nhiệt độ thấp nhất từ : 11 đến 14 độ; vùng núi 9  đến 11 độ, vùng núi cao có nơi dưới 8 độ Nhiệt độ cao nhất từ : 18 đến 21 độ, có nơi trên 21 độ THANH HÓA - THỪA THIÊN HUẾ Nhiều mây, có mưa vài nơi, riêng phía Nam ngày có mưa rải rác, Gió bắc đến tây bắc cấp 2 đến 3, Trời rét. Nhiệt độ thấp nhất từ : 15 đến 18 độ Nhiệt độ cao nhất từ : 19 đến 22 độ, có nơi trên 22 độ ĐÀ NẴNG ĐẾN BÌNH THUẬN Nhiều mây, có mưa rào và dông vài nơi, riêng phía ...