Located in the southeast of the Korat Plateau, "Thung Kula Ronghai" is a large-scale plain.The  terrain  is  characterized  by being  a  large  pan  basin  with  gradient  less  than  2%.  
There  are highlands around the edge of field which is gradually aslope to the middle region of the area. The area  stretches  crosswise  along  the  Moon  river  with  the  maximum  length  measured  by  150 kilometers and the maximum width measured by 50 kilometers. There are several main rivers, namely Lam Nam Siew, Lam Plub Pla and Lam Tao. The territory covers the areas of 51 sub- districts,  12  districts  in  5  provinces,  namely  Roi  Et,  Surin,  Si  Sa  Ket,  Yasothon  and Maha Sarakham  accounting  for  0.34  million  ha.  The  area  has  physical,  chemical  and  biological environments which are not suitable for doing paddy farming. As a result, products of rice and agricultural  crops  are very low. Therefore,  Land  Development  Department  entered  the  area  to make a survey to classify the soil, make plans for land use and study how to solve the problems of soil, water and communication. The objectives for this are to develop the agricultural areas of Thung  Kula  Ronghai  to  be  suitable  with  doing  paddy  farming  and  other  agricultures  of  other aspects. It has been doing this since 1981 by initially establishing a pilot project in the area of  704 ha. This has been done by making a survey and designing the engineering infrastructure to be the water-controlling  canal  system  in  the  paddy  field  or  so-called  "land  remodeling"  in   order  to mitigate flooding conditions. Water is drained from the area to reduce damages occurring to the rice tree. Moreover, water in the water drainage canal can also be used sufficiently in production. Ponds have been dug to store water to be used during the spell of rainy period. The soil and water conservation system has been constructed and maintained, and distribution of areas with saline soil has been reduced as follows: