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数值差分方法一般分为显式差分与隐式差分，对二者的区别我查阅了相关的资料。我后面发现关于二者区分不是有一些差异。如Wiki：
Explicit methods calculate the state of a system at a later time from the state of the system at the current time, whileimplicit methods find a solution by solving an equation involving both the current state of the system and the late[……]
洪涝灾害一般一起讲出来，之前也一直没有分清楚，今天就来说说洪与涝的区别
涝是指“过多雨水受地形、地貌、土壤阻滞，造成大量积水和径流，淹没低洼地带造成的灾害”，洪水是由“暴雨、冰雪急剧融化等自然或人为因素引起的江河湖库水量迅速增加或水位急剧上涨”。因此洪和涝都与水多有关，但区别还是明显的。从水文学角度来说，涝发生在产汇流过程中，产流无法及时汇入河湖而产生积水致涝；洪水则是水汇入河湖导致水位上升所致。
在我国大部分城市, 城市防洪与城市排水分别属于水利和市政两个行业，在学术研究上，两者也分别属于水利学科和城市给排水学科。一个城市的防汛工作则由这两个行业共同合作完成，其中市政部门负责将城[……]
“The Log wind profile is a semi-empirical relationship commonly used to describe the vertical distribution of horizontal mean wind speeds within the lowest portion of the planetary boundary layer. The relationship is well described in the literature”. “The logarithmic profile of wind speeds is g[……]
Before understanding the difference between hydrologic and hydraulic modelling, it is essential to have an understanding of the differences between hydrology and hydraulics.
“Hydrology is the scientific study of the movement, distribution, and quality of water on Earth and other planets, including[……]
Evaporation is the transferral of liquid water into a gaseous state and its diffusion into the atmosphere. In order for this to occur there must be liquid water present and available energy from the sun or atmosphere. Potential evaporation (PE) is that which occurs over the land’s surface, or woul[……]
According to the definition of Wikipedia, goundwater (or ground water) is the water present beneath Earth‘s surface in soil pore spaces and in the fractures of rock formations.Indeed, all water beneath the surface is ground water, but it is convenient to distinguish between the saturated and unsatur[……]
Overview
1. The future in rainfall-runoff modeling is therefore one of uncertainty, but this then implies a future question as to how best to constrain that uncertainty.
2. There have certainly been important and interesting advances in rainfall-runoff modeling techniques, but we are still very de[……]
