Gawser is a temperature index snow melting model which can be used to verify the hydrology of the basin. It is most suitable for agricultural or forest watersheds, but can be used to demonstrate the hydrology of other types of watersheds, such as urban or suburban water sheds. Gawser is suitable for basins with different development levels and can be used to show the impact of development on watershed hydrology. For example, in order to observe the hydrological impact of deforestation on agriculture, data can be used to simulate hydrological conditions in forest basins, and then reprogrammed to simulate hydrology in agricultural watersheds. We can study the behavior of runoff, infiltration, base flow and other hydrological conditions in each watershed.

Community land model is the land model of cesm (community earth system model). This is a collaborative project between the Earth Sciences, climate and global dynamics departments at the National Center for Atmospheric Research (NCAR), as well as the cesm land model and biochemistry working group. Other working groups, such as chemical climate and land ice, have also contributed to CML. The model formalizes and quantifies the concept of ecoclimatology to understand the impact of natural and human changes on climate. The circulation of energy, water, chemical elements and gases in terrestrial ecosystems plays a decisive role in climate change. The model reflects several aspects of surface heterogeneity, including components or sub models related to terrestrial Biogeophysics, hydrological cycle, biogeochemistry, human dimension and ecosystem dynamics.

Class model, as the "second generation" surface model that people need, was developed for Canadian GCM in the late 1980s. The model will fully deal with the effects of vegetation, snow cover and soil on the heat and temperature of the atmosphere. Various land surface parameterization schemes are compared in international projects. The class model is tested in the coupling model with GCM and various experiments with pilps. In such an operating environment, class is proved to perform quite well.