نشریه مدیریت آب
سال پنجم شماره 1 (پیاپی 12، بهار 1397)

This article provides small examples of how to use reliable and documented historical literature to help understand temperature and meteorological conditions. Anywhere information on frost, cold, temperature, precipitation (snow or rain) with date and day is included can be meteorological information. However, as with today's meteorological, the temperature or precipitation characteristics cannot be quantitatively extracted, Only qualitative information can be used. Thus, one can call this discovery a branch of meteorological knowledge, "historical meteorology". Findings from this knowledge can help to identify periods of famine, how to balance aquifers and lakes, and so on. Looking at this branch of meteorological knowledge is the solution to the drought problem.

The purpose of this article is to investigate the feasibility of using satellite images to detect eutrophication phenomena in the marginal lands of Maharlo Lake. For this purpose, Landsat 7 satellite ETM + digital images and a variety of digital processing were applied, including geometric and radiometric corrections as well as image contrast enhancement. The results showed that eutrophication critical points of Maharlo Lake margin occurred. Therefore, it is appropriate to prevent contaminants and wastewater from entering Shiraz.

In the current situation, water input is a valuable input that needs to be optimized. Firouzabad Plain has been encountered with the sharp decline in the groundwater level and the rapid increase in water salinity and their associated complications in agricultural development, due to immethodical exploitation of groundwater resources, in recent years. In this study, two conflicting objectives include to "increasing economic benefits" and "reducing negative environmental impacts", along with 13 different scenarios for harvesting of groundwater resources have been investigated. In order to determine the optimum cropping pattern and net income in terms of combined use of surface water and groundwater sources, a linear programming model as well as for calculating the environmental impacts of over harvesting coefficient have been used. The results indicate that reducing withdrawal of water resources and implementing a suitable cropping pattern will make sustainable development in the agricultural sector more possible.