Assessing the Problems and Increasing the Resilience of Madi in Isfahan against Urban Floods (A Case Study: Zones 1 and 3)

Water streams branching from Zayandehrood in Isfahan, called Madi, are unique features of this city. Madi play a vital role in climate, agriculture, groundwater recharge, and urban flood control in Isfahan. The purpose of this study is to evaluate the madi problems of areas 1 and 3 of Isfahan in order to increase their resilience to urban floods. In this research, using the method of survey and field surveys, the madi path of Isfahan city in the central areas of the city (regions 1 and 3) was investigated and the problems that arose for the madi in different places using the positioning device. Satellite finder and receipt-recording were recorded, then problems were identified and categorized and necessary management solutions were provided to solve problems. The results showed that the length of the madi network of region one is 10921 meters (10.9 km) and the madi of Niasaram spring with 3624 meters is the longest madi of this region. Zone 3, despite having a larger area than Zone One, has less material network than Zone One. Studies on the madi problems of these two areas showed that the madi of region one have 33 types of problems, the most important of which are bed slope correction and cleaning. There are 18 problems in area three, the most important of which is dredging and cleaning. For this purpose, solutions appropriate to the problems of each madi should be considered. Organizing the green space around the madi and proper use of urban furniture and creating a space in order to benefit and use as many residents as possible around the madi is one of the most important management strategies to maintain and organize the material network in these two areas.
 
Extended Abstract
1-Introduction
Madi is one of the special and unique features of the urban fabric of Isfahan, and without a doubt, the madi network in the city of Isfahan is part of its main identity. The development and expansion of activities as well as fundamental changes in the structure and elements of the city, has lessen the importance of madi identity in the city of Isfahan. The extent and passage of madis among the urban fabric of Isfahan, at least from two perspectives can be very important. And the second issue is that considering the very favorable space and environment that the madis have created in the city of Isfahan, it can be expedient issue.
 
2-Materials and Methods
In this research, the problems and madi disorders of regions 1 and 3 of Isfahan are investigated. The required information including the position of the madi, the problem nodes and the type and location of the problem created in the madi were collected by field and GPS. To ensure the accuracy of the information collected, an expert in this case has collected data and confirmed the data. Then the problems and difficulties related to each madi were identified. Afterwards,the obtained information and harvested points were entered in GIS software. Thus, the position of the madis and their related problems were shown on the map.
 
3- Results and Discussion
In Zone 1, there are 33 types of madi problems. Of these problems, 18 are related to bed slope correction, cleaning, as the most common among the existing problems. Dredging, bed slope correction, and cleaning are in the next category with 15 frequencies. 23 cases of problems in the madis of this area are related to bed slope correction, cleaning, and dredging. Each of these three is raised along with another problem and is seen in different forms, but from there in 23 types of Problems mentioned These three types of problems are also mentioned, so they are the main problem of this madi. In other cases, it is necessary to organize the green space or irrigation network. There are generally 14 types of problems in Area 3. Of these, the highest number is related to the dredging problem, cleaning with 18 items and then correcting the slope of the bed, cleaning with 11 items. In this area, along with 11 cases, the problem of dredging and cleaning is seen and is considered as a problem in this area. A comparison between the madis of Zone 1 and 3 shows that the madis of Zone 1 have more problems. These two areas in 5 types of problems including bed slope correction - cleaning; Landscaping - correction of bed slope; Dredging - correction of bed slope; Dredging - cleaning; Dredging - Organizing green space are common to each other. Except in the dredging-cleaning problem which is more frequent in region 3, in other problems of region 1 it is more frequent than in region 3. For a more detailed analysis of the madis and their role in each neighborhood and region, for each madi, a boundary with 3 ranges was drawn. The first range included a madi area of ​​20 meters and its scale is limited to direct access to the madi. The second area includes a 50-meter area, which includes alleys and residential units. The third area is drawn with a space of 100 meters and includes the scale of the neighborhood.
 
4- Conclusion
Considering that the madi has a vital role in the systematic connection between the internal elements of the neighborhoods and the neighborhoods in which the madi flows have a desirable structure and skeleton, in contrast to the neighborhoods where the madi do not have the connection and coherence between the elements of the neighborhood; Therefore, organizing the madis and solving their existing problems is effective in improving the structure of the neighborhood and the connection of its elements. For this purpose, solutions appropriate to the problems of each madi should be considered. Zones three and one, considering that the main problem was related to dredging and cleaning, requires that dredging and cleaning of all madis in these two areas be done and measures be taken to maintain the health of the environment around the madis. For example, collect garbage and prevent garbage from being dumped into madis. Dredging madis is done to prevent the growth of insects and animals. Also, by organizing the green space around the madis and proper use of urban furniture, a space can be created in order to benefit and use the residents around the madis as much as possible. By providing sufficient lighting for the night, it is possible to use the green space and the environment around the madi at all times. In general, considering that madi is part of the identity of the city of Isfahan and they are very important from a physical and functional point of view, it is necessary to provide a suitable ground for their preservation and continuity by maintaining and organizing the madi network.