Hydrography is a multidisciplinary field that involves the measurement and analysis of physical, chemical, and biological parameters of water bodies. Some of the physical and chemical tests that can be carried out in hydrography include:

1. Temperature: Temperature is an important parameter in hydrography, as it affects the density, salinity, and circulation of water bodies. Temperature can be measured using thermometers, thermistors, or conductivity-temperature-depth (CTD) sensors.

2. Salinity: Salinity is a measure of the amount of dissolved salts in water and is an important parameter in oceanography and hydrography. Salinity can be measured using a refractometer, a conductivity meter, or a CTD sensor.

3. Dissolved oxygen: Dissolved oxygen is a measure of the amount of oxygen dissolved in water and is an important parameter for aquatic life. Dissolved oxygen can be measured using a dissolved oxygen meter or a CTD sensor.

4. pH: pH is a measure of the acidity or alkalinity of water and is an important parameter for aquatic life and water quality. pH can be measured using a pH meter or a colorimetric test kit.

5. Nutrients: Nutrients such as nitrogen and phosphorus are essential for aquatic life, but excessive amounts can lead to eutrophication and harmful algal blooms. Nutrients can be measured using colorimetric test kits or a CTD sensor.

6. Chlorophyll-a: Chlorophyll-a is a pigment found in algae and is used as an indicator of phytoplankton biomass and primary productivity. Chlorophyll-a can be measured using a fluorometer or a CTD sensor.

These physical and chemical tests are just a few examples of the many parameters that can be measured in hydrography. Other parameters include turbidity, conductivity, total dissolved solids, and trace metals. The data collected from these tests can be used to create hydrographic maps, study water quality, and monitor changes in aquatic ecosystems over time.