Also called an entity-relationship (ER) diagram‚ a graphical representation of entities and their relationships to each other‚ typically used in computing in regard to the organization of data within databases or information systems. An entity is a piece of data-an object or concept about which data is stored. A relationship is how the data is shared between entities. There are three types of relationships between entities: 1. One-to-One One instance of an entity (A) is associated with one other
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be used as a farm pond by covering the bottom with polythin according to the need and that storage water uses in dry seasons and critical stages of the crop production. To protect the land cover and soil we make a grassed water way which takes the runoff water away from the cropping field‚ and we provide the bench terraces which make the cultivation easier and allow inter culturing operation comfortably‚ it reduces the soil erosion as well as unnecessary water logging in some areas. At the end of
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constructing of Relational Database using an EER Model 4.1 The steps involved in the design of relational database are 1) Developing the conceptual model – Drawing the ER/ EER diagram 2) Transforming the Conceptual model into a set of relations – relational schema and 3) Normalizing the relations. Once ER / EER model has been developed for the application ‚ ER/ EER diagram can be mapped into a relational model . ER/ EER diagram consists of the following components. 1)
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What is gully erosion? Gully erosion is the removal of soil along drainage lines by surface water runoff. Once started‚ gullies will continue to move by headward erosion or by slumping of the side walls unless steps are taken to stabilise the disturbance. Repair work done in the early stages of newly formed gullies is easier and more economical than letting the problem go unchecked for too long. Large gullies are difficult and costly to repair. What causes gully erosion ? Gully erosion occurs
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A. GEOLOGIC FACTORS 1. Is the site subject to geologic hazards (seismic‚ landslide‚ mudflow or tsunami)? YES/NO If yes please specify which hazards‚ the (ir) extent‚ and the relative level of risk. *YES - HAZARDS : 1. Earthquake 2. Landslide 3. Lahar flow 4. Ash fall 5. Tsunami 2. Will the proposed project create a geologic hazard or increase the intensity of such a hazard? YES / NO If yes‚ specify which hazard‚ how it will increase the
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DRAINAGE SYSTEM DESIGN Objective: The drainage system for the project functions to ensure effective transportation of storm water in order to avert the occurrence of flooding of the site. It also helps to safely discharge grey wastewater from buildings to their end points. NATURE OF SITE‚ LOCATION AND TOPOGRAPHY: The sight‚ predominantly sandy‚ slopes to the south-western part. Due to this topography‚ water flows to the southern part of the community and since there are insufficient drains to collect
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All 44 rivers in Kerala are highly polluted due to inflow of untreated domestic‚ industrial wastes and agriculture runoff. Most of the industries are near the thickly populated riversides‚ often near cities and towns. There is no efficient water treatment system in industries and city municipalities. Pollution level in some of the sites is far above permissible limits. Close proximity of increasing numbers of leach pit latrines under varying soil conditions‚ late rite (midland) and sandy soils
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these rivers‚ the farming season is planned around the floods‚ rice is a main crop and requires large quantities of water. Also‚ when the river floods it leaves behind fertile silt. write about how soils‚ vegetation and climate influence surface runoff which influences flooding or water shortage in the stupid drainage basin.. 1. Flood - Like droughts‚ flood are a naturally occurring phenomenon. Flooding is a result of a temporary overflow of water that escapes its usual boundaries. While small-scale
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Soil conservation includes all such measures which protect the soil from erosion and restore its fertility. These measures are of two types-(a) small measures to check soil erosion at local or even individual level‚ and (b) large measures at government level involving larger area and heavy investment. (a) Small Measures-These include afforestation‚ regularised land strip cultivation or contour farming or terrace farming in hilly areas‚ use of stubble mulch system‚ increasing cohesiveness of the
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activities affect the quality of the Lake and ocean. When many people carry out the same activity‚ the cumulative effect can be great. For example‚ the 45‚000 pet dogs in Lake Macquarie create about 9 tonnes of faeces every day. The impacts of stormwater runoff may include the loss of recreational amenity‚ the destruction of seagrass beds and aquatic habitat‚ and the growth of algal blooms. Last Modified: 20-AUG-2009 What is the Lake Macquarie Stormwater Management Plan? The Lake Macquarie Stormwater
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