نتایج جستجو برای: river management
تعداد نتایج: 927015 فیلتر نتایج به سال:
1. Protected area networks for river ecosystems must account for the highly connected nature of river habitats and the fact that conditions in distant locations can influence downstream habitats and biota. We used Marxan conservation planning software to address the unique constraints of reserve design in river ecosystems and structure a reserve network to overcome key challenges to freshwater ...
Garesoo river basin in Doab-Merek, as studying area of this research, located in northwest of Kermanshah province in west part of Iran. There is long-term hydro climatologic data in this basin about rainfall, temperature, etc. (more than 50 years) and main river data (about 35 years). Due to intense fall down groundwater level and seasonal river drying, in the past 10 years .It was necessary th...
Rivers are highly sensitive to environmental changes. Detection of river changes can lead to recognition and optimal management of the river channel side and riverbeds. This study aimed investigating the river changes and identifying the factors affecting the level of channel side of Babolrood in Babol City. The data of this study were collected from river discharge and sediment, land structure...
the aim of conducting this study was to investigate the foreign language learning needs of undergraduate economics students and business management students in faculties of social sciences of alzahra and azad naragh university. in the study, which was designed on the basis of a qualitative-quantitative basis using interviews and questionnaires, 146 female undergraduate business management as we...
The microbial faecal pollution of rivers has wide-ranging impacts on a variety of human activities that rely on appropriate river water quality. Thus, detailed knowledge of the extent and origin of microbial faecal pollution is crucial for watershed management activities to maintain safe water use. In this study, the microbial faecal pollution levels were monitored by standard faecal indicator ...
This thesis focuses on computer modelling issues such as i) uncertainty, including uncertainty in parameters, data input and model structure, ii) model complexity and how it affects uncertainty, iii) scale, as it pertains to scaling calibrated and validated models up or down to different spatial and temporal resolutions, and iv) transferability of a model to a site of the same scale. The discus...
چکیده با توسعه شهر نشینی و دخل و تصرف غیر مجاز در حریم رودخانه ها خسارات زیادی به رودخانه و محیط زیست اطراف آن وارده می شود. در حال حاضر بر اساس آئین نامه اصلاح شده بستر و حریم رودخانه ها، حریم کمی رودخانه که بلافاصله پس از بستر قرار می گیرد از 1 تا20 متر از منتهی الیه طرفین بستر رودخانه تعیین، که مقدار دقیق آن در هر بازه از رودخانه مشخص نیست. در کشورهای دیگر روشهای متفاوتی من جمله: درصد ریسک...
Status Gauges For a grading system to be of the greatest value to the river community, it must be brief, understandable, objective, and relevant. The system of gauges used in Table 16-1 visually describes the ecological health of the four floodplain reaches of the UMRS. The notations in Figure 16-1 are used to evaluate each river reach. In addition to pointing to current status, the gauges (Fig...
Successful river flow forecasting is a major goal and an essential procedure that is necessary in water resource planning and management. There are many forecasting techniques used for river flow forecasting. This study proposed a hybrid model based on a combination of two methods: Self Organizing Map (SOM) and Least Squares Support Vector Machine (LSSVM) model, referred to as the SOM-LSSVM mod...
We report on multiple patterns of differentiation and connectivity in the fanshell pearlymussel (Cyprogenia stegaria), based on different markers. Knowledge of genetic variation and genetic connectivity among remaining populations of this federally endangered species is needed to initiate implementation of the species recovery plan. We collected tissue samples from 96 specimens from the Green, ...
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